Perhaps you should try some spelling variations:
qua thanh » quan thanh, qua than, quang thanh
cua thanh » gia thanh, va thanh, ha thanh
ban hanh » ban hang
ky tang » ky nang, ky dang, kho tang
soc ban » hoc ban, coc ban, so ban
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
ha hoi » hoa hoi, xa hoi, va hoi
di cua » dai cua, doi cua, de cua

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 tang ((ha hoi) OR (ha noi)). hieu ((qua thanh) or (cua thanh)) soc ban hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky tang ((ha hoi) OR (ha noi)). hieu ((qua thanh) OR (cua thanh)) soc ban hanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky tang ((ha hoi) OR (ha noi)). hieu ((qua thanh) or (cua thanh)) soc ban hanh di cua tre*".