Perhaps you should try some spelling variations:
thanh tung » thanh cong
tuan thong » toan thong, tran thong, tuan phong
thong cong » trong cong, tong cong, thong thong
tung tuan » trung tuan, hung tuan, quang tuan
khi danh » chi danh, khao danh, khia canh
kho danh » khao danh, khop danh, kho canh
tap toan » tap quan, bai toan
tap doan » tap quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((khi danh) OR (kho danh)) - thanh tung tuan thong cong ((tap toan) or (tap doan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((khi danh) OR (kho danh)) - thanh tung tuan thong cong ((tap toan) OR (tap doan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((khi danh) OR (kho danh)) - thanh tung tuan thong cong ((tap toan) or (tap doan)) cao".
• Adding a wildcard symbol may retrieve word variants: doi ((khi danh) OR (kho danh)) - thanh tung tuan thong cong ((tap toan) or (tap doan)) cao*.