Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
ho chieu » theo chieu, doi chieu, mot chieu
cua tong » cua cong, cua dong, cua nong
dan than » dan chan, ban than, van than
van toan » van tuan, van tan, van thanh

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

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