Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung xay » trong xay, trung gay, trung tam
dung cong » dung trong
cong san » cong tac
toan ban » van ban

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 - thanh trung xay dung cong san ((((toan ban) or (toan cao))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung xay dung cong san ((((toan ban) OR (toan cao))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung xay dung cong san ((((toan ban) or (toan cao))) or (toan tap))*.