Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
khoa tap » khoa tai, khoa than, hoc tap
hoa tan » hoa dan, hoa tin, hoa han
hoa van » hoa dan, hoang van, hoa phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - canh tranh cua thong cong thanh ((khoa tap) or (((hoa tan) or (hoa van))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - canh tranh cua thong cong thanh ((khoa tap) OR (((hoa tan) OR (hoa van)))).
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - canh tranh cua thong cong thanh ((khoa tap) or (((hoa tan) or (hoa van))))*.