Perhaps you should try some spelling variations:
pham dung » pham dang, pham dong, pham hung
van pham » san pham, van phan, van phat
thi hang » thi hanh, thi nang, thi hong
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, van anh, van ban
lai cua » dai cua, hai cua, lai chau
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
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) or (so sanh)) thi hang va hoi. hieu van pham dung ((van hanh) or (ban hanh)) lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) thi hang va hoi. hieu van pham dung ((van hanh) OR (ban hanh)) lai cua te.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) thi hang va hoi. hieu van pham dung ((van hanh) or (ban hanh)) lai cua te*.