Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
va thanh » gia thanh, ban thanh, va tinh
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet

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

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