Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lai » hanh lam, hanh tai, thanh lap
thu sach » tu sach, thuat sach, thuoc sach
qua pham » quan pham, quy pham, qua cham
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, sach thu
duy van » duy vat, dung van
duy va » duy vat, day va, duy v
ma hoi » xa hoi, ma hoa, me hoi

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 xang ((ma hoi) or (mai hoi)). hieu qua pham ((duy va) OR (duy van)) hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty xang ((ma hoi) OR (mai hoi)). hieu qua pham ((duy va) OR (duy van)) hanh lai chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty xang ((ma hoi) or (mai hoi)). hieu qua pham ((duy va) OR (duy van)) hanh lai chau triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ty xang ((ma hoi) or (mai hoi)). hieu qua pham ((duy va) OR (duy van)) hanh lai chau triet*.