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 sang, chieu tinh
hanh thang » nhanh thang, thanh thang, hanh trang
doi chieu » doc hieu, doi chi, ho chieu
thang van » tang van, thanh van, thong van
van dung » van dong, xay dung, tin dung
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: doi chieu xanh - hanh thang van dung ((phuong thanh) or (phuong thao)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh thang van dung ((phuong thanh) OR (phuong thao)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh thang van dung ((phuong thanh) or (phuong thao)) toan cau*.