Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, sach tranh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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 (doi chieu)) xanh - ((lanh tranh) OR (hanh trinh)) va nhung cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) xanh - ((lanh tranh) OR (hanh trinh)) va nhung cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) xanh - ((lanh tranh) OR (hanh trinh)) va nhung cong san toan ban*.