Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu
manh va » hanh va, anh va, lanh va
minh va » tinh va, sinh va, sinh vat

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) OR (minh va)) nhung 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) OR (minh va)) nhung cong dan phan cau~".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (ho chieu)) xanh - canh ((manh va) OR (minh va)) nhung cong dan phan cau*.