Perhaps you should try some spelling variations:
thu hang » thi hang, thuc hanh, thu huong
hieu van » hieu va, thien van, lieu va
su sach » so sach
vu sach » vu bach, vu khach
hang xa » hoang xa, hang va, hang ca
van cam » van nam, van lam, van cau
vi cua » vai cua, di cua
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: ((su sach) OR (vu sach)) thu hang xa hoi. hieu van cam ((duc va) or (hoc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) thu hang xa hoi. hieu van cam ((duc va) OR (hoc va)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) thu hang xa hoi. hieu van cam ((duc va) or (hoc va)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) thu hang xa hoi. hieu van cam ((duc va) or (hoc va)) hanh vi cua te*.