Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thanh tung » thanh cong
nhung cong » dung cong, nhung don, nhung lang
thong cong » trong cong, tong cong, thong thong
hang cong » dang cong, hang nong, bang cong
tung cua » trung cua, tuong cua, dung cua
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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