Perhaps you should try some spelling variations:
phuong cong » phuong dong, phung cong, phuong hoang
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
phong cong » phong chong, thong cong, chong cong
ho chieu » theo chieu, hoc thieu, doi chieu
tan toan » tan tran, tap toan, van toan
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: ho chieu sang - ((hanh tranh) or (hanh trang)) cua ((phuong cong) OR (phong cong)) tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((hanh tranh) OR (hanh trang)) cua ((phuong cong) OR (phong cong)) tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((hanh tranh) or (hanh trang)) cua ((phuong cong) OR (phong cong)) tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((hanh tranh) or (hanh trang)) cua ((phuong cong) OR (phong cong)) tan toan cao*.