Perhaps you should try some spelling variations:
thang hai » thanh hai, hang hai, thong hai
van thang » van thanh, van khang, van hang
kho tang » cao tang
cuu tre » cua tre, cau tren, cau treo
hai cuu » hai cua, hai chu, hai cuc
luc van » luoc van, luu van, duc van
cac luc » cau luc, coc luc, cac nuoc
qua cac » cua cac
ky tang » ky nang, ky dang, ky trong
su cao » cu cao, vu cao, su co
su cac » tu cac, su can, eu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su cac) OR (su cao)) ((ky tang) or (kho tang)) xa hoi. hieu qua cac luc van thang hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (su cao)) ((ky tang) OR (kho tang)) xa hoi. hieu qua cac luc van thang hai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su cac) OR (su cao)) ((ky tang) or (kho tang)) xa hoi. hieu qua cac luc van thang hai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su cac) OR (su cao)) ((ky tang) or (kho tang)) xa hoi. hieu qua cac luc van thang hai cuu tre*.