Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
dam thuc » am thuc, dan thuc, nam thuc
hanh dai » hanh tai, hanh dao, vanh dai
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
dai hoi » dai hoc, dai hai, dai moi
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
y sang » _ sang, duy sang
dai va » mai va

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 y sang dai hoi. hieu va ((dam thuc) or (cam xuc)) va hanh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y sang dai hoi. hieu va ((dam thuc) OR (cam xuc)) va hanh dai va triet*.