Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » canh tranh, hanh trinh, hanh trang
duong cong » dung cong, luong cong, duong trong
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
dong cong » dung cong, dang cong, cong cong
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 sang - hanh tranh cua ((dong cong) OR (duong cong)) tinh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh tranh cua ((dong cong) OR (duong cong)) tinh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh cua ((dong cong) OR (duong cong)) tinh toan cao*.