Perhaps you should try some spelling variations:
tri nang » thi nang, tra nang, tri mang
tri bang » tri ban, tri mang, thai bang
te sach » toc sach
hanh va » hang va, hanh vi
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
va qua » va quan, va quy, va quang
x hoi » xa hoi, o hoi, x ho

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