Perhaps you should try some spelling variations:
cau trung » cau truong, cac trung, cao trung
va trien » va truyen, va thiet, va tuyen
va triet » va thiet, ve triet, cua triet
hanh vai » hanh vi, hanh va, hanh tai
trung ha » trung hoc, trung tam, trung cap
ha hanh » ha thanh, nha hanh, ha anh
so sach » so sanh, bo sach, co sach
sach uu » sach luu, sach tu, sach xu
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
uu nang » cuu nang, vu nang, cuu nong

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach uu nang xa hoi. ((hieu ve) or (hieu va)) cau trung ha hanh vai ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach uu nang xa hoi. ((hieu ve) OR (hieu va)) cau trung ha hanh vai ((va triet) OR (va trien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach uu nang xa hoi. ((hieu ve) or (hieu va)) cau trung ha hanh vai ((va triet) OR (va trien))*".