Perhaps you should try some spelling variations:
hanh trinh » canh tranh
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
luat dung » suat dung, luat chung, luat quang
dung cong » dung trong
cong nang » cong ngang, cong lang, cong nong
nang phan » nang phat, nang thanh, nang quan
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu lang)) - ((hanh trinh) OR (hanh chinh)) luat dung cong nang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - ((hanh trinh) OR (hanh chinh)) luat dung cong nang phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - ((hanh trinh) OR (hanh chinh)) luat dung cong nang phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - ((hanh trinh) OR (hanh chinh)) luat dung cong nang phan cau*.