Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thanh via » thanh va, thanh vien, thanh vinh
ban thanh » ban hanh, ban hang
hieu viec » nhieu viec, hieu ve, sieu viet
va triet » va thiet, va trien, ve triet
viec cac » vien cac, viec cua, viec lam
cac tuc » cac toc, cac tu, cac tac
tuc ban » thuc ban, truc ban, tu ban
tu sach » thu sach, su sach, te sach
y xang » ty xang
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 y xang ((x hoi) or (o hoi)). hieu viec cac tuc ban thanh via ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y xang ((x hoi) OR (o hoi)). hieu viec cac tuc ban thanh via ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y xang ((x hoi) or (o hoi)). hieu viec cac tuc ban thanh via ((cua triet) or (va triet))*.