Perhaps you should try some spelling variations:
tong cong » trong cong, cong cong, dung cong
theo hop » theo phap, theo ucp, tao hop
thao hoc » thai hoc, than hoc, thao khoa
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
hang ca » hang va, hang tai, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo hop) OR (thao hoc)) manh - thanh ((hang ca) or (nang cao)) tong cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo hop) OR (thao hoc)) manh - thanh ((hang ca) OR (nang cao)) tong cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo hop) OR (thao hoc)) manh - thanh ((hang ca) or (nang cao)) tong cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo hop) OR (thao hoc)) manh - thanh ((hang ca) or (nang cao)) tong cong dan toan ban*.