Perhaps you should try some spelling variations:
tuan thai » xuan thai, tuan khai, tuan tai
thai cua » than cua, tai cuc, tri cua
van tuan » van quan, van ban, anh tuan
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cua tre » cua te, cuu tre, cua triet
cac xuc » cam xuc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
tu sac » tu sach, tu cac, tu bac
nang o » nang co, nang ho, nang ro
tu san » thu san, tu ban, tu can
o lai » o lao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu san)) ky nang o lai. hieu ve ((cac xuc) or (cac nuoc)) van tuan thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang o lai. hieu ve ((cac xuc) OR (cac nuoc)) van tuan thai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu san)) ky nang o lai. hieu ve ((cac xuc) or (cac nuoc)) van tuan thai cua tre*.