Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham luc » cham soc, nhan luc, cham cuu
vanh tai » hanh tai, anh tai, vanh dai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
van tai » von tai, van tuan
luc va » duc va, tuc va, loc va

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

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