Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
tinh va » tich va, trinh van, trinh vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
pham tu » phan tu, pham thi, pham tai
nang xa » nang x, lang xa, nang ma
tinh vi » trinh vi, tinh voi, dinh vi

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 van pham tu va ((tinh vi) OR (tinh va)) ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu van pham tu va ((tinh vi) OR (tinh va)) ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu van pham tu va ((tinh vi) OR (tinh va)) ((cua triet) or (va triet))*".