Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
danh lai » danh sai, gianh lai, dinh lam
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, va hanh
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sac ky)) nang ma hoi. hieu va cam duc va danh lai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sac ky)) nang ma hoi. hieu va cam duc va danh lai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sac ky)) nang ma hoi. hieu va cam duc va danh lai ((cua triet) or (cua viet))*.