Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh trung » thanh trung, hanh trang, manh trung
thanh toan » thanh hoa, thanh san, tinh toan
hieu lang » chieu sang, nhieu tang, hieu van
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
trung ha » trung hoc, trung tam, trung cap
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (hieu quang)) - hanh trung ha ((hang cong) OR (bang cong)) thanh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - hanh trung ha ((hang cong) OR (bang cong)) thanh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (hieu quang)) - hanh trung ha ((hang cong) OR (bang cong)) thanh toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (hieu quang)) - hanh trung ha ((hang cong) OR (bang cong)) thanh toan cao*.