Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
cua tre » cuu tre, cua triet, dua tren
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
cua te » cua tu

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 dang xa hoi. hieu vu cham luc ((va hanh) or (va danh)) di ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky dang xa hoi. hieu vu cham luc ((va hanh) OR (va danh)) di ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu cai ky dang xa hoi. hieu vu cham luc ((va hanh) or (va danh)) di ((cua tre) or (cua te))*.