Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
mang xa » lang xa, mang may, dang xay
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luc van » luoc van, luu van, duc van
cuu tre » cua tre, cau tren, cau treo
te cac » tu cac, ve cac, te cao
vi cuu » vi luu, vinh cuu

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