Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, chau tinh, kieu tinh
quang toan » quang tuan, quang tran, quang doan
lieu tinh » trieu tinh, diep tinh, bien tinh
manh tran » manh toan, manh tuan, canh tranh
tran tuan » tran xuan, tran quang, tran thanh
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
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: hoc ((chieu tinh) or (lieu tinh)) - manh tran tuan ((hang cong) OR (dang cong)) quang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (lieu tinh)) - manh tran tuan ((hang cong) OR (dang cong)) quang toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (lieu tinh)) - manh tran tuan ((hang cong) OR (dang cong)) quang toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (lieu tinh)) - manh tran tuan ((hang cong) OR (dang cong)) quang toan cau*.