Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, xach tay
hang xa » hoang xa, hang va, hang ca
van cac » van hac, van cau, van bac
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach thu)) hang xa hoi. hieu van cac luc va hanh vi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) hang xa hoi. hieu van cac luc va hanh vi cua su.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) hang xa hoi. hieu van cac luc va hanh vi cua su*.