Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thanh dang » thanh hang, thanh dan, thanh dong
dang quang » dung quang, nang quan, dang hung
quang dung » quang trung, ung dung, cuong dung
dung dong » dung cong, vung dong, dung trong
dong san » cong san, dong bang, dong von
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac

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) OR (thien hach)) - thanh dang quang dung dong san than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - thanh dang quang dung dong san than cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (thien hach)) - thanh dang quang dung dong san than cap*.