Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu quan » lieu quan, thien quan, lien quan
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
xa hanh » xa thanh, xa khanh, va hanh
lai cua » dai cua, hai cua, lai chau
cau tu » dau tu, cau truc
tu xa » tu xay, tu va, te xa

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 lang xa hoi. ((hieu quan) or (hieu qua)) cau tu xa hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty lang xa hoi. ((hieu quan) OR (hieu qua)) cau tu xa hanh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ty lang xa hoi. ((hieu quan) or (hieu qua)) cau tu xa hanh lai cua triet*.