Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sang mai » sang ma, sang tai, lang mai
hanh dai » hanh tai, hanh dao, vanh dai
dam thuc » am thuc, dan thuc, nam thuc
va hanh » van hanh, va thanh, va danh
su sach » so sach
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
vu sach » vu bach, vu khach
hieu va » lieu va, hieu qua
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) OR (vu sach)) ky sang mai 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) OR (vu sach)) ky sang mai hoi. hieu va ((dam thuc) OR (cam xuc)) va hanh dai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky sang mai hoi. hieu va ((dam thuc) or (cam xuc)) va hanh dai va triet*".