Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc tien » hoc tieng, hoc hien, hoc vien
tien anh » tieng anh, tien manh, dien anh
manh cua » doanh cua
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than
ban cua » ban quan

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

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