Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va cham » va chat, va tham
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
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: vu sach y ((nang xa) OR (nang ma)) hoi. lieu va cham luc van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang xa) OR (nang ma)) hoi. lieu va cham luc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach y ((nang xa) OR (nang ma)) hoi. lieu va cham luc van hanh vi cua tre*.