Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cai ky » cao ky, cac ky, sai ky
cam ky » cao ky, cac ky
di cua » dai cua, doi cua, de cua

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

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