Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
dac tinh » may tinh, ban tinh
toan ban » van ban
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dac tinh) or (ha tinh)) - ((canh manh) or (lanh manh)) va nhung cong thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dac tinh) OR (ha tinh)) - ((canh manh) OR (lanh manh)) va nhung cong thanh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((dac tinh) or (ha tinh)) - ((canh manh) or (lanh manh)) va nhung cong thanh toan ban*.