Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach kem » hanh kem
pham xuc » pham duc, pham cuc, pham xuan
cao hoi » cau hoi, co hoi, cao hoc
hieu su » hieu sau, tieu su, hieu so
su pham » san pham
va hanh » van hanh, va thanh, va danh
va dan » ca dan, va dao, va dau
day su » day sau, dan su, day du

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 kem) or (sach y)) nang cao hoi. hieu su pham xuc ((va hanh) or (va dan)) day su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach kem) OR (sach y)) nang cao hoi. hieu su pham xuc ((va hanh) OR (va dan)) day su triet.
• Adding a wildcard symbol may retrieve word variants: te ((sach kem) or (sach y)) nang cao hoi. hieu su pham xuc ((va hanh) or (va dan)) day su triet*.