Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien sang » hien trang, khien bang, chieu sang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sang - canh tranh cua nhung cong dan ((((toan tai) or (van ban))) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - canh tranh cua nhung cong dan ((((toan tai) OR (van ban))) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - canh tranh cua nhung cong dan ((((toan tai) or (van ban))) or (toan cao))*.