Perhaps you should try some spelling variations:
chi chang » thi chang, chi nhanh, thi hang
dung cong » dung trong
chi sang » chi lang, chieu sang, khai sang
hang tai » hang va, dung tai
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu
hang ca » hang va, nang cao, hang dau

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: doi ((chi sang) OR (chi chang)) - hanh ((hang ca) OR (hang tai)) dung cong dan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi sang) OR (chi chang)) - hanh ((hang ca) or (hang tai)) dung cong dan phan cau~".
• Adding a wildcard symbol may retrieve word variants: doi ((chi sang) OR (chi chang)) - hanh ((hang ca) or (hang tai)) dung cong dan phan cau*.