Perhaps you should try some spelling variations:
duong phuong » dung phuong, duong phong, dong phuong
phuong manh » phuong anh, phung manh, phuong danh
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
manh toan » thanh toan, anh tuan, tinh toan
toan cau » toan cao, toan ban, toan tap
luan » quan, lan

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 xanh) or (chieu sang)) - hanh ((tran van) OR (luan van)) duong phuong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sang)) - hanh ((tran van) OR (luan van)) duong phuong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sang)) - hanh ((tran van) OR (luan van)) duong phuong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sang)) - hanh ((tran van) OR (luan van)) duong phuong manh toan cau*.