Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chieu » doi chi, ho chieu, mot chieu
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
cong cao » cong cau, cong cac, cong co
chat tap » chat tai, chat thai, chat va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) tach - hanh tranh va nhung cong cao chat tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) tach - hanh tranh va nhung cong cao chat tap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) tach - hanh tranh va nhung cong cao chat tap*.