Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tham soc » cham soc, tham nuoc, thai son
tu sach » thu sach, su sach, te sach
va danh » va dinh, va hanh, dia danh
nang xa » nang x, lang xa, nang ma
va dan » ca dan, va dao, va dau
y nang » ky nang, ly nang, v nang

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 tham soc ((va danh) or (va dan)) dau ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van tham soc ((va danh) OR (va dan)) dau ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van tham soc ((va danh) or (va dan)) dau ((cua triet) or (cua viet))*.