Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thu sach » tu sach, thuat sach, thuoc sach
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
qua cao » qua cac, qua ca, qua cai
cao xuc » cam xuc, cao duc, cao suc
va vanh » va danh, va hanh, va anh
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ma hoi. hieu qua cao xuc ((va vanh) or (va van)) thai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoi. hieu qua cao xuc ((va vanh) OR (va van)) thai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ma hoi. hieu qua cao xuc ((va vanh) or (va van)) thai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoi. hieu qua cao xuc ((va vanh) or (va van)) thai ((cua triet) OR (va triet))*.