Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
cau luc » cau truc, cau phuc
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac luc » coc luc, cac nuoc, cac cuoc
sach ty » sach y, sach tu, xach tay
hang xa » hoang xa, hang va, hang ca
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) OR (cau luc)) va hanh vai 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) OR (cau luc)) va hanh vai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach thu)) hang xa hoi. hieu van ((cac luc) OR (cau luc)) va hanh vai cua su".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) hang xa hoi. hieu van ((cac luc) OR (cau luc)) va hanh vai cua su*.