Perhaps you should try some spelling variations:
thanh luong » thanh huong, thanh long, thanh cuong
duong trong » dung trong
thanh hung » thanh huong, thanh tung, thanh trung
trong tinh » truong tinh, trong kinh, trong sinh
lieu tinh » trieu tinh, diep tinh
bien tinh » bi tinh, yen tinh, diep tinh
van duong » van dong, van dung, van phong
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: theo ((lieu tinh) OR (bien tinh)) - ((thanh luong) or (thanh hung)) van duong trong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((lieu tinh) OR (bien tinh)) - ((thanh luong) OR (thanh hung)) van duong trong tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((lieu tinh) OR (bien tinh)) - ((thanh luong) or (thanh hung)) van duong trong tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((lieu tinh) OR (bien tinh)) - ((thanh luong) or (thanh hung)) van duong trong tinh toan ban*.