Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
hanh tranh » canh tranh, hanh trinh, hanh trang
khong cang » thong cong, hong bang, thong cung
khong dung » thong dung, phuong dung, cuong dung
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
tuan cau » toan cau, tuan cu, thuan cam
quan cau » quang cao, toan cau, quan ha

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 - hanh tranh cua ((khong cang) OR (khong dung)) van ((tuan cau) or (quan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - hanh tranh cua ((khong cang) OR (khong dung)) van ((tuan cau) OR (quan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - hanh tranh cua ((khong cang) OR (khong dung)) van ((tuan cau) or (quan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - hanh tranh cua ((khong cang) OR (khong dung)) van ((tuan cau) or (quan cau))*.