Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien hach » hien hanh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien hach) or (thien thanh)) - canh tranh cua ((nhung cong) OR (thong cong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (thien thanh)) - canh tranh cua ((nhung cong) OR (thong cong)) dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) or (thien thanh)) - canh tranh cua ((nhung cong) OR (thong cong)) dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (thien thanh)) - canh tranh cua ((nhung cong) OR (thong cong)) dan toan tap*.