Perhaps you should try some spelling variations:
tri nang » thi nang, tri bang, tri mang
tra nang » thi nang, kha nang, da nang
te sach » toc sach
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
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 ve cac tuc va 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 ve cac tuc va hanh va qua su".
• Adding a wildcard symbol may retrieve word variants: te sach ((tri nang) OR (tra nang)) xa hoi. hieu ve cac tuc va hanh va qua su*.