Perhaps you should try some spelling variations:
phong dung » phuong dung, thong dung, hong dung
chieu sach » chinh sach, chiet tach, chieu sang
khong dung » thong dung, phuong dung, cuong dung
hieu lang » chieu sang, hieu quang, nhieu tang
tranh van » tran van, trinh van, thanh van
manh toan » thanh toan, anh tuan, tinh toan
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: ho ((hieu lang) or (chieu sach)) - canh tranh van ((phong dung) OR (khong dung)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sach)) - canh tranh van ((phong dung) OR (khong dung)) manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chieu sach)) - canh tranh van ((phong dung) OR (khong dung)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sach)) - canh tranh van ((phong dung) OR (khong dung)) manh toan cau*.