Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc dan, thuc day
ve cam » ve cham, ve cac, va cam
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang xa hoi. hieu ve cam ((thuc va) OR (thuc vat)) hanh vi ((va triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang xa hoi. hieu ve cam ((thuc va) or (thuc vat)) hanh vi ((va triet) OR (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu ve cam ((thuc va) or (thuc vat)) hanh vi ((va triet) OR (ve triet))*.