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
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
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 ((sach ky) or (sach y)) nang xa hoi. hieu ve ((cham luc) OR (cham cuu)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) 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 ((sach ky) or (sach y)) nang xa hoi. hieu ve ((cham luc) OR (cham cuu)) van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) nang xa hoi. hieu ve ((cham luc) OR (cham cuu)) van hanh vi cua tre*.