Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc kieu » hoc dieu, hoc tieu, ho kieu
hoc sieu » hoc dieu, hoc thieu, hoc hien
dung cua » dung cho
cong san » cong tac
san toan » van toan, dan toan, manh 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 kieu) OR (hoc sieu)) tinh - manh ((dung cua) or (dung luan)) nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc kieu) OR (hoc sieu)) tinh - manh ((dung cua) OR (dung luan)) nhung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc kieu) OR (hoc sieu)) tinh - manh ((dung cua) or (dung luan)) nhung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc kieu) OR (hoc sieu)) tinh - manh ((dung cua) or (dung luan)) nhung cong san toan cao*.