Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh cua » trinh luat, trinh quan, trinh luan
hoc dieu » hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
tinh cua » sinh cua, tinh chat, tranh cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc dieu) OR (ho chieu)) xanh - hanh ((trinh cua) OR (tinh cua)) nhung cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc dieu) or (ho chieu)) xanh - hanh ((trinh cua) OR (tinh cua)) nhung cong san toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((hoc dieu) or (ho chieu)) xanh - hanh ((trinh cua) OR (tinh cua)) nhung cong san toan ban*.