Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
thai cua » than cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
soc ban » hoc ban, coc ban, soc ba
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
tang xa » trang xa, tang ma, lang xa
xac ky » cac ky, bac ky
so ban » sao ban, so bang, co ban
sac ky » cac ky, sai 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 (sac ky)) tang xa hoi. hieu ve cham ((soc ban) or (so ban)) thanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((xac ky) OR (sac ky)) tang xa hoi. hieu ve cham ((soc ban) OR (so ban)) thanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((xac ky) or (sac ky)) tang xa hoi. hieu ve cham ((soc ban) or (so ban)) thanh thai cua tre*.