Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
kho canh » kho tang, thu canh, cho can
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
bo manh » ho manh, bo canh, bui manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: thao ((bo manh) or (kho canh)) - anh tang cua thong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thao ((bo manh) OR (kho canh)) - anh tang cua thong cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: thao ((bo manh) or (kho canh)) - anh tang cua thong cong dan toan cao*.