Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
luc van » luoc van, luu van, duc van
vi cua » vai cua, di cua
te sac » te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cham luc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cham luc van hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cham luc van hanh vi cua tre*".