Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc van » luoc van, luu van, duc van
lua tre » cua tre, luy tre, dua tren
vi lua » vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky ((nang xa) or (nang ma)) hoi. hieu va cham luc van hanh vi lua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky ((nang xa) OR (nang ma)) hoi. hieu va cham luc van hanh vi lua tre.
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((nang xa) or (nang ma)) hoi. hieu va cham luc van hanh vi lua tre*.