Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va hanh » van hanh, va thanh, va danh
cao suc » cao su, cao duc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach va » sach xa, sach ha, sach dao
sach v » sach y, sach 2, sach vay
va cao » va cac, va co, va dao
suc va » duc va, tuc va, luc va
cua te » cua tu

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: hoc ((sach v) OR (sach va)) nang xa hoi. hieu va cao suc va hanh vi ((cua triet) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach v) OR (sach va)) nang xa hoi. hieu va cao suc va hanh vi ((cua triet) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach v) OR (sach va)) nang xa hoi. hieu va cao suc va hanh vi ((cua triet) or (cua te))*.