αាα π α្αុំαៀαα ំαាα―ααាα SOP (Smart-Book style) α²្αα’្αα α’ាα αααៅα’αុαα្ααាαα្αាαα αិαααα្αααα្αាα់αីαិααូαα្αាαីααិαា π π …
αំαួαααα់α’្ααα្α’αាα់ π α ើααាαាα្ααាααααα្ααាαែαααុα្ααាα ្αើαα α់αα់។ α្αុំαឹααα្αα់α²្ααាαα្α αិααα់αាα៖ π§ α េαុα’្αីαាααាααុ…
αំαួααេះα្α’αាα់ π α្αោះ “communication” αឺαំαាα់αាα technique αៀα αៅα្αុααាααួααេα។ α្αុំαឹααα្α ាααា simple + practical (α’…
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