Perhaps you should try some spelling variations:
phuong doan » phuong hoang, huong dan, phuong hoa
phuong loan » phuong lan, huong loan, phuong hoang
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
thanh dung » thanh duong, thanh tung, thanh hung
hanh dung » anh dung, hanh dong, manh dung
cua trung » cua truong, xuan trung, cua nhung
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: theo chieu sang - ((hanh dung) or (thanh dung)) cua trung ((phuong doan) OR (phuong loan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - ((hanh dung) OR (thanh dung)) cua trung ((phuong doan) OR (phuong loan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sang - ((hanh dung) or (thanh dung)) cua trung ((phuong doan) OR (phuong loan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - ((hanh dung) or (thanh dung)) cua trung ((phuong doan) OR (phuong loan)) toan cau*.