Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
quang cao » nang cao, quang nam, quang cua
cong van » cong vang, cong san, song van
quan cau » toan cau, quan ha, quan cua

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 chinh) or (canh tranh)) quan dung cong van ((quan cau) OR (quang cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((hanh chinh) OR (canh tranh)) quan dung cong van ((quan cau) OR (quang cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - ((hanh chinh) or (canh tranh)) quan dung cong van ((quan cau) OR (quang cao))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((hanh chinh) or (canh tranh)) quan dung cong van ((quan cau) OR (quang cao))*.