Perhaps you should try some spelling variations:
thong cong » trong cong, thong thong, phong chong
hien hanh » dieu hanh
tong cong » trong cong, cong cong, dung cong
manh cua » doanh cua
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
ban cua » ban 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 hanh - canh ((manh cua) or (ban cua)) ((thong cong) or (tong cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - canh ((manh cua) OR (ban cua)) ((thong cong) OR (tong cong)) dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - canh ((manh cua) or (ban cua)) ((thong cong) or (tong cong)) dan than cao*.