Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
van lam » van nam
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
lam tu » nam tu, cam tu, dam tu
tu sac » tu cac, tu san, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu sach)) ky nang ma hoi. hieu van lam tu va hanh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang ma hoi. hieu van lam tu va hanh vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu sach)) ky nang ma hoi. hieu van lam tu va hanh vi ((cua tre) or (su triet))*.