Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
phuong dan » phuong danh, phuong doan, huong dan
doi chieu » doc hieu, doi chi, ho chieu
vat dung » van dung, viet dung, mat duong
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
va dung » van dung, va duong, va ung

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 trinh ((va dung) OR (vat dung)) phuong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh trinh ((va dung) OR (vat dung)) phuong dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh trinh ((va dung) OR (vat dung)) phuong dan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh trinh ((va dung) OR (vat dung)) phuong dan ((toan cau) or (toan cao))*.