Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
thu sach » tu sach, thuat sach, thuoc sach
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
sach ty » sach y, sach tu, sach thu
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((sang ma) or (nang ma)) hoi. ((hieu va) OR (lieu va)) pham duc va hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((sang ma) OR (nang ma)) hoi. ((hieu va) OR (lieu va)) pham duc va hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((sang ma) or (nang ma)) hoi. ((hieu va) OR (lieu va)) pham duc va hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((sang ma) or (nang ma)) hoi. ((hieu va) OR (lieu va)) pham duc va hanh lai cua triet*.