Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
sach ty » sach tu, sach thu, xach tay
nang xa » lang xa, nang ma, mang xa
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
du va » dau va, tu va, su 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) or (sach y)) ((nang xa) or (nang x)) hoi. lieu va cac du va hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) ((nang xa) OR (nang x)) hoi. lieu va cac du va hanh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) ((nang xa) or (nang x)) hoi. lieu va cac du va hanh lai cua triet*.