Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dieu » han dieu, hinh dieu, hoang dieu
dieu cua » dieu tra
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
nang ma » tang ma, sang ma, nang cao
xuc va » duc va, tuc va, luc va

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 ty ((nang ma) or (mang may)) hoi. ((hieu ve) or (hieu va)) cam xuc va hanh dieu cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (mang may)) hoi. ((hieu ve) OR (hieu va)) cam xuc va hanh dieu cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang ma) or (mang may)) hoi. ((hieu ve) or (hieu va)) cam xuc va hanh dieu cua triet*.