Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham duc » pham duc, cham soc, pham duy
hang lap » sang lap, hang la, hang tap
hang tai » hang va, dung tai
ban hang » ngan hang
cua tre » cuu tre, cua triet, dua tren
duc ban » duc tan, duc van, dua ban
sach ty » sach tu, sach thu, xach tay
tai hoi » tai khoi, dai hoi, tai hai
cua te » cua tu

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 (sach y)) hang tai hoi. hieu qua cham duc ban hang lap ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) hang tai hoi. hieu qua cham duc ban hang lap ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach y)) hang tai hoi. hieu qua cham duc ban hang lap ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach y)) hang tai hoi. hieu qua cham duc ban hang lap ((cua tre) or (cua te))*.