Perhaps you should try some spelling variations:
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua, manh cua
cong vang » cong lang, cong quang, cong ngang
ho chiet » ho chieu, ho thiet, hoa thiet
cong van » cong san, song van, cong tan
toan ban » van ban
cua dan » cua dang, cua ban, ca dan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (hoc thiet)) tach - canh tranh cua dan ((cong van) OR (cong vang)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) or (hoc thiet)) tach - canh tranh cua dan ((cong van) OR (cong vang)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) or (hoc thiet)) tach - canh tranh cua dan ((cong van) OR (cong vang)) toan ban*.