Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
tieu sach » chieu sach, dien sach, te sach
hang cong » dang cong, hang nong, bang cong
thang va » hang va, trang va, thong va
tran van » luan van
va hang » van hang, va nang, va lang
tan van » tang van, luan van, dang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - nhanh thang va hang cong ((tan van) OR (tran van)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - nhanh thang va hang cong ((tan van) OR (tran van)) ban".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - nhanh thang va hang cong ((tan van) OR (tran van)) ban*.