Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thanh di » thanh doi, thanh de, thanh do
qua tham » qua cham, qua than, qua thanh
tang ha » lang ha, tang ma, trung ha
cua tre » cua te, cuu tre, cua triet
soc ban » hoc ban, so ban, soc ba
ky tang » ky nang, ky dang, kho tang
coc ban » co ban, cac ban, hoc ban
te cao » te bao
ha hoi » hoa hoi, ha noi, 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: te cao ky tang ha hoi. hieu qua tham ((soc ban) OR (coc ban)) thanh di ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cao ky tang ha hoi. hieu qua tham ((soc ban) OR (coc ban)) thanh di ((cua tre) OR (cua viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cao ky tang ha hoi. hieu qua tham ((soc ban) OR (coc ban)) thanh di ((cua tre) or (cua viet))*".