Perhaps you should try some spelling variations:
thien van » thi van
cau thuc » cuu thuc, can thuc, cau phuc
va triet » va thiet, va trien, ve triet
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
nang ma » tang ma, sang ma, nang cao
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ma hoi » mai hoi, xa hoi, ma hoa
vi va » vi van, vai va, vu 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 (co sach)) ky nang ma hoi. thien van ((cau thuc) OR (cau truc)) va danh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ky nang ma hoi. thien van ((cau thuc) OR (cau truc)) va danh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (co sach)) ky nang ma hoi. thien van ((cau thuc) OR (cau truc)) va danh vi va triet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ky nang ma hoi. thien van ((cau thuc) OR (cau truc)) va danh vi va triet*.