Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cham luc » cham soc, nhan luc, cham cuu
tinh bai » tinh bac, tinh hai, hinh bai
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
luc may » truc may, phuc may
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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

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