Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
canh manh » lanh manh, canh tranh, cach mang
chuan dao » chuan doan, chuan iso, chuan ha
ho trieu » mot trieu, 25 trieu, 30 trieu
manh cua » doanh cua, ban cua
doan » doanh, toan, soan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho trieu tinh - canh manh cua ((nhung cong) OR (thong cong)) dan ((chuan dao) or (chan doan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho trieu tinh - canh manh cua ((nhung cong) OR (thong cong)) dan ((chuan dao) OR (chan doan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho trieu tinh - canh manh cua ((nhung cong) OR (thong cong)) dan ((chuan dao) or (chan doan))".
• Adding a wildcard symbol may retrieve word variants: ho trieu tinh - canh manh cua ((nhung cong) OR (thong cong)) dan ((chuan dao) or (chan doan))*.