Perhaps you should try some spelling variations:
thanh trung » thanh tung
thuat nhung » thuat hung, thuat chung, thuat chuong
nhieu tang » chieu sang, hieu lang, nhiet nang
chieu sach » chinh sach, chiet tach, chieu sang
tuan nhung » quan nhung, tuan hung, tranh nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: theo ((nhieu tang) or (chieu sach)) - thanh trung ((tuan nhung) OR (thuat nhung)) cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((nhieu tang) OR (chieu sach)) - thanh trung ((tuan nhung) OR (thuat nhung)) cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((nhieu tang) or (chieu sach)) - thanh trung ((tuan nhung) OR (thuat nhung)) cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((nhieu tang) or (chieu sach)) - thanh trung ((tuan nhung) OR (thuat nhung)) cong dan toan cao*.