Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
tuong cong » trong cong, tong cong, luong cong
trinh toan » tinh toan, thanh toan, trinh han
trung ba » truong ba, trung ha, trung va
toan cau » 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: doi ((chieu sach) or (chiet tach)) - thanh trung ba ((tuong cong) OR (truong cong)) trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chiet tach)) - thanh trung ba ((tuong cong) OR (truong cong)) trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chiet tach)) - thanh trung ba ((tuong cong) OR (truong cong)) trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chiet tach)) - thanh trung ba ((tuong cong) OR (truong cong)) trinh toan cau*.