Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
canh manh » lanh manh, canh tranh, cach mang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu
manh va » hanh va, anh va, minh va

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 hien) OR (ho chieu)) xanh - canh manh va ((nhung cong) OR (dung cong)) dan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (ho chieu)) xanh - canh manh va ((nhung cong) OR (dung cong)) dan phan cau~".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (ho chieu)) xanh - canh manh va ((nhung cong) OR (dung cong)) dan phan cau*.