Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh loi » thanh hoa, thanh hai, thanh lap
ban thanh » ban hanh, ban hang
dung ban » dung san, dung dan, dong ban
hieu van » hieu va, thien van, lieu va
tac dung » sach dung, xay dung, tin dung
tu sach » thu sach, su sach, te sach
van tac » van thac, van tai, van tan
y nang » ky nang, ly nang, v nang
cua te » cua tu
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 nang ((x hoi) OR (o hoi)). hieu van tac dung ban thanh loi ((cua triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((x hoi) OR (o hoi)). hieu van tac dung ban thanh loi ((cua triet) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((x hoi) OR (o hoi)). hieu van tac dung ban thanh loi ((cua triet) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((x hoi) OR (o hoi)). hieu van tac dung ban thanh loi ((cua triet) or (cua te))*.