Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
danh dau » lanh dao, hang dau, danh tu
hang tai » hang va, dung tai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
soc va » hoc va, loc va, doc 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 y nang xa hoi. hieu van cham soc va ((danh dau) or (hang tai)) ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van cham soc va ((danh dau) OR (hang tai)) ((cua triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van cham soc va ((danh dau) or (hang tai)) ((cua triet) or (cua vat))*.