Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
lang cua » mang cua, hang cua, long cua
cong cua » cong cu, dong cua, huong cua
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban

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 ((lang cua) or (cong cua)) nhung cong dan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - nhanh ((lang cua) OR (cong cua)) nhung cong dan ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - nhanh ((lang cua) or (cong cua)) nhung cong dan ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - nhanh ((lang cua) or (cong cua)) nhung cong dan ((toan cao) OR (toan ban))*.