Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hoc duoc » hoc nuoc, hoa duoc, hoc dung
hanh lai » hanh lam, hanh tai, thanh lap
hieu van » thien van, lieu va, hieu ve
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
duoc va » nuoc va, duc va, duoc ma
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, dang xay
ang xa » lang xa, mang xa, dang xay

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 ((xang xa) or (ang xa)) hoi. ((hieu van) or (hieu va)) hoc duoc va hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((xang xa) OR (ang xa)) hoi. ((hieu van) OR (hieu va)) hoc duoc va hanh lai cua triet*.