Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chieu » hoc thieu, ho chieu, hoc dieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong van » cong vang, cong san, song van
tan ca » tan cua, tang ca, tan ha

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) OR (hoc hien)) xanh - hanh tranh cua nhung cong van ((tan ca) OR (dan ca))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (hoc hien)) xanh - hanh tranh cua nhung cong van ((tan ca) OR (dan ca))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) xanh - hanh tranh cua nhung cong van ((tan ca) OR (dan ca))*.