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

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) OR (co hoi)). hieu 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) OR (co hoi)). hieu 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) OR (co hoi)). hieu 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) OR (co hoi)). hieu van coc tuc xa thanh doi cua triet*.