Perhaps you should try some spelling variations:
nhanh mang » nhanh lang, hanh mang, nhanh thang
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
nhan cach » phan cac
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - ((nhanh mang) OR (nhanh quang)) qua dung cong dan ((phan tu) or (nhan cach))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((nhanh mang) OR (nhanh quang)) qua dung cong dan ((phan tu) OR (nhan cach)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - ((nhanh mang) OR (nhanh quang)) qua dung cong dan ((phan tu) or (nhan cach))".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - ((nhanh mang) OR (nhanh quang)) qua dung cong dan ((phan tu) or (nhan cach))*.