Perhaps you should try some spelling variations:
nang thuong » hang thuong, nang truong, dang thuong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thuong dan » huong dan, thuong han, thuong dam
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
manh va » hanh va, anh va, lanh va
minh va » tinh va, sinh va, sinh vat

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 sach)) - canh ((manh va) OR (minh va)) nang thuong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - canh ((manh va) OR (minh va)) nang thuong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - canh ((manh va) OR (minh va)) nang thuong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - canh ((manh va) OR (minh va)) nang thuong dan toan cau*.