Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, dao hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
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: tu sai ky nang xa hoi. hieu va cham luc ((((va hanh) OR (ban hanh))) or (va danh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang xa hoi. hieu va cham luc ((((va hanh) OR (ban hanh))) OR (va danh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang xa hoi. hieu va cham luc ((((va hanh) OR (ban hanh))) or (va danh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang xa hoi. hieu va cham luc ((((va hanh) OR (ban hanh))) or (va danh)) vi cua tre*.