Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
ly hang » ly quang
hang ca » hang va, nang cao, hang tai
qua cam » qua cham, qua cac, qua cai
dua ban » dia ban, cua ban, qua ban
vi cua » vai cua, di cua
cua te » cua tu
qua ca » qua cac, qua cua, qua cai
ca hoi » cau hoi, cua hoi, xa hoi

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 (do sanh)) ly hang ca hoi. hieu ((qua cam) or (qua ca)) dua ban thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (do sanh)) ly hang ca hoi. hieu ((qua cam) OR (qua ca)) dua ban thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (do sanh)) ly hang ca hoi. hieu ((qua cam) or (qua ca)) dua ban thanh vi cua te*.