Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien hach » hien hanh
nhung song » nhung bong, nhung chong, nhung huong
nhung cong » dung cong, thong cong, hang cong
tranh va » tranh van, trang va, trinh va
van tan » van tuan, van ban, van tai
tan ca » tan cua, tang ca, dan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien hach) OR (thien thanh)) - canh tranh va ((nhung song) or (nhung cong)) van tan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (thien thanh)) - canh tranh va ((nhung song) OR (nhung cong)) van tan ca.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) OR (thien thanh)) - canh tranh va ((nhung song) or (nhung cong)) van tan ca".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) OR (thien thanh)) - canh tranh va ((nhung song) or (nhung cong)) van tan ca*.