Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh loi » thanh hoa, thanh hai, thanh lap
hieu van » hieu va, thien van, lieu va
dung ban » dung san, dong ban, dung bai
dung dan » dung dat, dung san, tung dan
tu sach » thu sach, su sach, te sach
van tac » van thac, van tai, van tan
cua te » cua tu
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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. hieu van tac ((dung ban) OR (dung dan)) 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. hieu van tac ((dung ban) OR (dung dan)) 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. hieu van tac ((dung ban) OR (dung dan)) thanh loi ((cua triet) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van tac ((dung ban) OR (dung dan)) thanh loi ((cua triet) or (cua te))*.