Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
tran tuan » tran xuan, tran quang, tran thanh
cong danh » cuong danh, cong dan, cong khanh
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 thieu quang - manh ((tran tuan) or (trung tam)) nhung ((cong danh) OR (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - manh ((tran tuan) OR (trung tam)) nhung ((cong danh) OR (cong thanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - manh ((tran tuan) or (trung tam)) nhung ((cong danh) OR (cong thanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - manh ((tran tuan) or (trung tam)) nhung ((cong danh) OR (cong thanh)) toan cau*.