Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
hieu van » hieu va, thien van, lieu va
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh

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 ky dang xa hoi. hieu van cam ((duc va) or (thuc va)) hanh vi ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu van cam ((duc va) OR (thuc va)) hanh vi ((va triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu van cam ((duc va) or (thuc va)) hanh vi ((va triet) or (ve triet))*.