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 vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
te sai » te tai, te bai, te lai
sai ky » sac ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky ((nang xa) OR (nang ma)) hoi. hieu vu cham luc van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky ((nang xa) OR (nang ma)) hoi. hieu vu cham luc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sai ky ((nang xa) OR (nang ma)) hoi. hieu vu cham luc van hanh vi cua tre*.