Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, chat lua
cham cuu » cap cuu, chat cua
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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 ky nang xa hoi. hieu ve ((cham luc) OR (cham cuu)) van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. hieu ve ((cham luc) OR (cham cuu)) van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ve ((cham luc) OR (cham cuu)) van hanh vi cua tre*.