Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, chau tinh, kieu tinh
luong cong » dung cong, trong cong, cong cong
duong cong » dung cong, duong trong, trong cong
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh luan » khanh luan, hang luan, hanh luat
vinh toan » tinh toan, hinh toan, minh toan
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: theo ((chieu tinh) OR (lieu tinh)) - hanh luan van ((luong cong) or (duong cong)) vinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (lieu tinh)) - hanh luan van ((luong cong) OR (duong cong)) vinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) OR (lieu tinh)) - hanh luan van ((luong cong) or (duong cong)) vinh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) OR (lieu tinh)) - hanh luan van ((luong cong) or (duong cong)) vinh toan cau*.