Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
va trien » va truyen, va thiet, va tuyen
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
van anh » van thanh, tuan anh, van minh
vi va » vi van, vai va, vu va

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

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