Perhaps you should try some spelling variations:
thu hang » thuc hanh, thu huong, thu trang
thi hang » thi hanh, thi nang, thi hong
pham duy » pham duc
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
va pham » van pham, va phat, va phap
duy van » duy vat, dung van
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) OR (thi hang)) va hoi. hieu va pham duy van hanh lai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((thu hang) OR (thi hang)) va hoi. hieu va pham duy van hanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ((thu hang) OR (thi hang)) va hoi. hieu va pham duy van hanh lai cua te*.