Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh tai » thanh tai, hang tai, han tai
va hanh » van hanh, va thanh, va danh
cam tuc » cam tu, nam thuc, dam thuc
so sach » so sanh, co sach, hoc sach
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
bo sach » co sach, hoc sach
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
tai va » thai va, mai va, tri va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (bo sach)) ky sang ma hoi. hieu va ((cam tuc) or (cam xuc)) va hanh tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ky sang ma hoi. hieu va ((cam tuc) OR (cam xuc)) va hanh tai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) ky sang ma hoi. hieu va ((cam tuc) or (cam xuc)) va hanh tai va triet*".