Perhaps you should try some spelling variations:
chiet tach » chieu sach
thang van » thanh van, thong van, thang va
nang cong » nang song, dang cong, bang cong
ho chiet » ho chieu, ho thiet, hoc thiet
tang van » dang van, hoang van, trong van
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - thanh ((thang van) or (tang van)) nang cong san ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((thang van) OR (tang van)) nang cong san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((thang van) or (tang van)) nang cong san ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((thang van) or (tang van)) nang cong san ((toan cao) OR (toan ban))*.