Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
thanh tung » thanh cong
duong manh » duong van
hien xanh » hien hanh, hien nhanh, chieu xanh
cong manh » cong danh, cong thanh, hoang manh
tung va » trung va, tuong va, dung va
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (tien thanh)) - thanh tung va hang ((cong manh) OR (duong manh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (tien thanh)) - thanh tung va hang ((cong manh) OR (duong manh)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (tien thanh)) - thanh tung va hang ((cong manh) OR (duong manh)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (tien thanh)) - thanh tung va hang ((cong manh) OR (duong manh)) van ban*.