Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
ban thanh » ban hanh, ban hang
cham coc » cham soc, kham cuoc, chat co
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va
coc ban » co ban, cac ban, hoc ban
xac ky » sac ky, bac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((xac ky) OR (cac ky)) tang xa hoi. ((hieu ve) or (hieu van)) cham coc ban thanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((xac ky) OR (cac ky)) tang xa hoi. ((hieu ve) OR (hieu van)) cham coc ban thanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((xac ky) OR (cac ky)) tang xa hoi. ((hieu ve) or (hieu van)) cham coc ban thanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((xac ky) OR (cac ky)) tang xa hoi. ((hieu ve) or (hieu van)) cham coc ban thanh thai cua tre*.