Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hanh tang » hanh trang, hanh mang, hanh tung
dung cong » dung trong
ho trieu » mot trieu, 25 trieu, 30 trieu
anh tang » anh bang, anh dang, anh nang
hai quan » tac quan
quan cao » quang cao, quan cau, quan ao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho trieu tinh - ((hanh tang) or (anh tang)) cua ((nhung cong) OR (dung cong)) hai quan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho trieu tinh - ((hanh tang) OR (anh tang)) cua ((nhung cong) OR (dung cong)) hai quan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho trieu tinh - ((hanh tang) or (anh tang)) cua ((nhung cong) OR (dung cong)) hai quan cao".
• Adding a wildcard symbol may retrieve word variants: ho trieu tinh - ((hanh tang) or (anh tang)) cua ((nhung cong) OR (dung cong)) hai quan cao*.