Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
dung cong » dung trong
doc hieu » toc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
dan chan » dan gian, dan ca, van chat
dan han » dan than, dan hanh, dan phan

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

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