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

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 ky ((nang xa) or (((mang may) or (sang ma)))) hoi. hieu ve cham luc van hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky ((nang xa) OR (((mang may) OR (sang ma)))) hoi. hieu ve cham luc van hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: te cac ky ((nang xa) or (((mang may) or (sang ma)))) hoi. hieu ve cham luc van hanh vi luu tre*.