Perhaps you should try some spelling variations:
tuan thai » xuan thai, tuan khai, tuan tai
hieu viec » nhieu viec, hieu ve, sieu viet
cau tren » cu tren, dau tren, ca tren
van tuan » van quan, van ban, anh tuan
viec cac » vien cac, viec cua, viec lam
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau treo
nang o » nang co, nang ho, nang ro
tu san » thu san, tu ban, tu can
tu sac » tu sach, tu cac, tu bac
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 xuc van tuan thai ((cuu tre) OR (cau tren))~.
• 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 xuc van tuan thai ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu san)) ky nang o lai. hieu viec cac xuc van tuan thai ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu san)) ky nang o lai. hieu viec cac xuc van tuan thai ((cuu tre) OR (cau tren))*.