Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
cong quang » luong quang, thong quang, duong quang
quang toan » quang tuan, quang tran, quang doan
hoc thieu » toc thieu, hoc hien
tang suat » nang suat, tang luan, cong suat
tang luat » tang luan, nang suat, hang luan
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: hoc thieu sach - hanh ((tang suat) OR (tang luat)) trong cong quang toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh ((tang suat) OR (tang luat)) trong cong quang toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((tang suat) OR (tang luat)) trong cong quang toan ban*.