Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tay lang » tai lang, tay tang, tay quang
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
te sach » toc sach
van cau » van dau, van hau, van chat
cau luc » cau truc, cau phuc
y lang » o lang, _ lang, yen lang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y lang) OR (tay lang)) xa hoi. hieu van cau luc ((van hanh) or (ban hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (tay lang)) xa hoi. hieu van cau luc ((van hanh) OR (ban hanh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y lang) OR (tay lang)) xa hoi. hieu van cau luc ((van hanh) or (ban hanh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) OR (tay lang)) xa hoi. hieu van cau luc ((van hanh) or (ban hanh)) vi cua triet*.