Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
hien manh » tien manh, hieu manh, hien nhanh
hien hanh » dieu hanh
thong ung » thong dung, thong cung, thong vung
dung tong » dung trong, dung thong, dung cong
tap toan » tap doan, bai toan
tap quan » tac quan, hai quan

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 manh) or (hien hanh)) - thanh thong ung dung tong ((tap toan) OR (tap quan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (hien hanh)) - thanh thong ung dung tong ((tap toan) OR (tap quan)) tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) or (hien hanh)) - thanh thong ung dung tong ((tap toan) OR (tap quan)) tap*".