Perhaps you should try some spelling variations:
pham dung » pham dang, pham dong, phan dung
pham hung » pham hong, pham hang, phan hung
sach thu » sach thue, sach thieu, sach tham
thu hang » thi hang, thuc hanh, thu huong
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
va hoi » xa hoi, va hoc, va hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu hang va hoi. hieu va ((pham dung) OR (pham hung)) van hanh lai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu hang va hoi. hieu va ((pham dung) OR (pham hung)) van hanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach thu hang va hoi. hieu va ((pham dung) OR (pham hung)) van hanh lai cua te*.