Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
luu tre » luu tru, cuu tre, luy tre
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
luc van » luoc van, luu van, duc van
tang ma » mang may, tang van
va cham » va chat, va tham
vi luu » vi lua
te cac » tu cac, ve cac, de cac
te cao » te bao

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

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