Perhaps you should try some spelling variations:
hai chau » lai chau, ha chau, hat chau
hai cau » hai chu, hai hau, hoi cau
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach ty, sach kem
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc va » duc va, tuc va, luc va
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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