Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thuat dung » thuat hung, thuat xung, thuat song
thuat ung » thuat hung, thuat xung, thuat song
manh toan » thanh toan, anh tuan, tinh toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - canh tranh ((thuat ung) OR (thuat dung)) cong ((manh toan) or (van toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh tranh ((thuat ung) OR (thuat dung)) cong ((manh toan) OR (van toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - canh tranh ((thuat ung) OR (thuat dung)) cong ((manh toan) or (van toan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh tranh ((thuat ung) OR (thuat dung)) cong ((manh toan) or (van toan)) cao*.