Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach thieu, sach tham
nang mai » nang ma, nang tai, lang mai
cac xuc » cac nuoc, chat xuc, cac cuoc
sach ty » sach y, sach tu, xach tay
mai hoi » mai khoi, dai hoi, lai hoi
vi hoa » voi hoa, vi hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) or (sach thu)) nang mai hoi. hieu hien ((cac xuc) or (cam xuc)) van hanh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) nang mai hoi. hieu hien ((cac xuc) OR (cam xuc)) van hanh vi hoa viet.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach thu)) nang mai hoi. hieu hien ((cac xuc) or (cam xuc)) van hanh vi hoa viet*.