Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
tuan thai » xuan thai, tuan khai, tuan tai
viec cac » vien cac, viec cua, viec lam
van tuan » van quan, van ban, anh tuan
thai cuu » thai cua, tai cuc, thi cuc
cac vuc » cac nuoc, cac vung, cac cuoc
vuc van » duc van, luc van, thuc van
cuu tre » cua tre, cau tren, cau treo
tu sac » tu sach, tu cac, tu bac
tu san » thu san, tu ban, tu can
nang o » nang co, nang ho, nang ro
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 viec cac vuc van tuan thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang o lai. hieu viec cac vuc van tuan thai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu san)) ky nang o lai. hieu viec cac vuc van tuan thai cuu tre*.