Perhaps you should try some spelling variations:
thanh trung » thanh tung
quoc truong » quoc trung, hoc truong, quoc vuong
phuong dinh » phuong binh, phuong linh, phuong trinh
chieu sang » chieu sach, chieu xanh, nhieu tang
quoc trong » nuoc trong, quoc trung, duoc trong
hieu lang » hieu quang, nhieu tang, hieu van
dinh toan » tinh toan, hinh toan, minh toan
toan tap » toan 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 sang) or (hieu lang)) - thanh trung ((quoc truong) OR (quoc trong)) phuong dinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung ((quoc truong) OR (quoc trong)) phuong dinh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - thanh trung ((quoc truong) OR (quoc trong)) phuong dinh toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh trung ((quoc truong) OR (quoc trong)) phuong dinh toan tap*.