Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
trinh phap » trinh phan, trinh han, trinh chat
tranh van » tran van, trinh van, thanh van
hieu van » hieu va, thien van, lieu va
phap ma » phap mo, pham ma, phap va

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 van)) - canh tranh van ((nhung cong) OR (thong cong)) trinh phap ma~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu van)) - canh tranh van ((nhung cong) OR (thong cong)) trinh phap ma.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu van)) - canh tranh van ((nhung cong) OR (thong cong)) trinh phap ma".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu van)) - canh tranh van ((nhung cong) OR (thong cong)) trinh phap ma*.