Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va daoh » va danh, va doanh
cua tre » cua te, cuu tre, cua triet
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
va dao » ca dao
de cua » le cua, te cua, dieu 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 san ky nang x ho. hieu ve cham luc ((van hanh) or (((va daoh) or (va dao)))) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang x ho. hieu ve cham luc ((van hanh) OR (((va daoh) OR (va dao)))) de cua tre.
• Adding a wildcard symbol may retrieve word variants: tu san ky nang x ho. hieu ve cham luc ((van hanh) or (((va daoh) or (va dao)))) de cua tre*.