Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cong tac » cong ty
toan tap » toan ban
manh va » anh va, minh va, lanh va
hanh va » hang va, hanh vi

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 chieu xanh - hanh ((manh va) OR (hanh va)) nhung cong tac ((toan tap) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh ((manh va) OR (hanh va)) nhung cong tac ((toan tap) or (van ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((manh va) OR (hanh va)) nhung cong tac ((toan tap) or (van ban))*.