Perhaps you should try some spelling variations:
sach tri » sach tai, sach tren, sach truc
tri nang » thi nang, tra nang, tri bang
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
xac va » tac va, ac va, bac va
vi qua » vi quan, va qua, vi lua

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 xa hoi. hieu ve cac ((xac va) or (duc va)) hanh vi qua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tri nang xa hoi. hieu ve cac ((xac va) OR (duc va)) hanh vi qua su.
• Adding a wildcard symbol may retrieve word variants: te sach tri nang xa hoi. hieu ve cac ((xac va) or (duc va)) hanh vi qua su*.