Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
quang cao » nang cao, quang nam
dung cong » dung trong
ho chieu » theo chieu, doi chieu, mot chieu
nung cao » nang cao, nhung cau, luong cao
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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 chieu) OR (hoc thieu)) sach - thanh ((quang cao) or (nung cao)) dung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - thanh ((quang cao) OR (nung cao)) dung cong van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - thanh ((quang cao) or (nung cao)) dung cong van toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - thanh ((quang cao) or (nung cao)) dung cong van toan ban*.