Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hang tai » hang va, dung tai
thanh vi » hanh vi, thanh va, thanh ve
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
qua cam » qua cham, qua cac, qua ca
su sach » vu sach
hang ca » hang va, nang cao, hang dau
so sach » so sanh, bo sach, co sach
vi cua » vai cua, di cua
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: ((su sach) or (so sach)) ty ((hang ca) OR (hang tai)) hoi. hieu qua cam duc ban thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty ((hang ca) OR (hang tai)) hoi. hieu qua cam duc ban thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ty ((hang ca) OR (hang tai)) hoi. hieu qua cam duc ban thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty ((hang ca) OR (hang tai)) hoi. hieu qua cam duc ban thanh vi cua te*.