Perhaps you should try some spelling variations:
thanh tung » thanh cong
tong manh » tung manh, tong panh, duong manh
tong minh » thong minh, trong minh, song minh
doc hieu » toc thieu, hoc thieu, hoc hien
tung cua » trung cua, tuong cua, dung cua
toan cao » toan ban, toan tap
cua han » cua hang, cua nhan, cua 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 (theo tieu)) xanh - thanh tung cua han ((tong manh) OR (tong minh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo tieu)) xanh - thanh tung cua han ((tong manh) OR (tong minh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo tieu)) xanh - thanh tung cua han ((tong manh) OR (tong minh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo tieu)) xanh - thanh tung cua han ((tong manh) OR (tong minh)) toan cao*.