Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
te sach » toc sach
may hoi » may thoi, tay hoi, mai hoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
hanh va » hang va, hanh vi
y mang » cay mang
xuc va » tuc va, luc va, xac va
va cua » va chua, via cua, ca 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 mang may hoi. ((hieu ve) OR (hieu va)) cam ((xuc va) or (duc va)) hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y mang may hoi. ((hieu ve) OR (hieu va)) cam ((xuc va) OR (duc va)) hanh va cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y mang may hoi. ((hieu ve) OR (hieu va)) cam ((xuc va) or (duc va)) hanh va cua triet*".