Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
qua thanh » quan thanh, cua thanh, qua than
thanh vi » hanh vi, thanh va, thanh ve
qua tham » qua cham, qua than, quan pham
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
tang ma » mang may, tang van
soc ban » hoc ban, coc ban, so ban
vi cua » vai cua, di cua
te cac » tu cac, ve cac, te cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky ((lang ha) or (tang ma)) hoi. hieu ((qua tham) OR (qua thanh)) soc ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky ((lang ha) OR (tang ma)) hoi. hieu ((qua tham) OR (qua thanh)) soc ban thanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky ((lang ha) or (tang ma)) hoi. hieu ((qua tham) OR (qua thanh)) soc ban thanh vi cua tre*".