Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh doi » thanh loi, thanh moi, thanh do
thien van » thi van
xa thanh » va thanh, ha thanh, ta thanh
hieu van » hieu va, lieu va, hieu ve
thi nang » thi cong, ki nang, thi hanh
coc tuc » coc luc, hoc thuc, doc thuc
ty hang » ly hang, ty xang, thi hang
doi cua » dai cua, hoi cua
te sach » toc sach
o hoi » co hoi, o hoc, o hai

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 ((ty hang) or (thi nang)) o hoi. ((hieu van) OR (thien van)) coc tuc xa thanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty hang) OR (thi nang)) o hoi. ((hieu van) OR (thien van)) coc tuc xa thanh doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty hang) or (thi nang)) o hoi. ((hieu van) OR (thien van)) coc tuc xa thanh doi cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty hang) or (thi nang)) o hoi. ((hieu van) OR (thien van)) coc tuc xa thanh doi cua triet*.