Perhaps you should try some spelling variations:
ban hang » ngan hang
hieu van » hieu va, thien van, lieu va
sach kem » hanh kem
vai cuu » vai cua
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
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 kem) or (sac ky)) nang ma hoa. hieu van cam duc ((ban hanh) or (ban hang)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach kem) OR (sac ky)) nang ma hoa. hieu van cam duc ((ban hanh) OR (ban hang)) vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach kem) or (sac ky)) nang ma hoa. hieu van cam duc ((ban hanh) or (ban hang)) vai cuu tre*.