Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doanh cua » doanh luan
cong tang » cong thang, cong tan, cong lang
hoc lieu » hoc dieu, hoc sieu, ho lieu
hoc tieu » hoc thieu, hoc dieu, hoc sieu
manh cua » ban cua
tang van » dang van, hoang van, trong van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc lieu) or (hoc tieu)) tinh - lanh ((manh cua) or (doanh cua)) nhung cong tang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc lieu) OR (hoc tieu)) tinh - lanh ((manh cua) OR (doanh cua)) nhung cong tang van ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc lieu) or (hoc tieu)) tinh - lanh ((manh cua) or (doanh cua)) nhung cong tang van ban*.