Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
thanh thong » thanh thuong, thanh hong, thanh thang
thong cong » trong cong, tong cong, thong thong
hien hanh » dieu hanh
thong qua » thong quan, thong cua, thong tu
qua thong » qua trong, quang thong, suat thong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien thanh) or (hien hanh)) - thanh thong qua thong cong ((dan toan) OR (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - thanh thong qua thong cong ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) or (hien hanh)) - thanh thong qua thong cong ((dan toan) OR (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (hien hanh)) - thanh thong qua thong cong ((dan toan) OR (manh toan)) cao*.