Perhaps you should try some spelling variations:
nhiet tach » chiet tach
nhung cong » hang cong, nhung don, nhung lang
thong cong » trong cong, tong cong, thong thong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
tranh cua » doanh cua, manh cua
dung cong » dung trong
van toan » van tuan, van tan, van thanh
toan ban » van 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 nhiet tach - canh tranh cua ((((nhung cong) OR (thong cong))) or (dung cong)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - canh tranh cua ((((nhung cong) OR (thong cong))) OR (dung cong)) van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nhiet tach - canh tranh cua ((((nhung cong) OR (thong cong))) or (dung cong)) van toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - canh tranh cua ((((nhung cong) OR (thong cong))) or (dung cong)) van toan ban*.