Perhaps you should try some spelling variations:
phuong thanh » phong thanh, truong thanh, muong thanh
phuong thao » phuong phap, phuong thuc
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh thang » nhanh thang, thanh thang, hanh trang
thang va » hang va, trang va, thong va
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) OR (chieu sang)) - hanh thang va dung ((phuong thanh) or (phuong thao)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - hanh thang va dung ((phuong thanh) OR (phuong thao)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sang)) - hanh thang va dung ((phuong thanh) or (phuong thao)) toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) OR (chieu sang)) - hanh thang va dung ((phuong thanh) or (phuong thao)) toan cau*.