Perhaps you should try some spelling variations:
tri nang » thi nang, tri bang, tri mang
van hanh » van thanh, ban hanh, van anh
tra nang » thi nang, kha nang, da nang
te sach » toc sach
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va
va qua » va quan, va quy, va quang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((tri nang) OR (tra nang)) xa hoi. ((hieu va) or (hieu qua)) cac xuc van hanh va qua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tri nang) OR (tra nang)) xa hoi. ((hieu va) OR (hieu qua)) cac xuc van hanh va qua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tri nang) OR (tra nang)) xa hoi. ((hieu va) or (hieu qua)) cac xuc van hanh va qua su".
• Adding a wildcard symbol may retrieve word variants: te sach ((tri nang) OR (tra nang)) xa hoi. ((hieu va) or (hieu qua)) cac xuc van hanh va qua su*.