Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thanh tung » thanh cong
hien danh » thien danh, hien hanh, hien khanh
cong cong » cong dong, trong cong, dung cong
cong lang » cong vang, cong luong, cong quang
thanh lap » phan lap, thanh hai, thanh van
tung cua » trung cua, tuong cua, dung cua

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 danh) or (hien nhanh)) - thanh tung cua cong cong lang ((thanh lap) OR (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien danh) OR (hien nhanh)) - thanh tung cua cong cong lang ((thanh lap) OR (thanh san)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien danh) or (hien nhanh)) - thanh tung cua cong cong lang ((thanh lap) OR (thanh san))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien danh) or (hien nhanh)) - thanh tung cua cong cong lang ((thanh lap) OR (thanh san))*.