Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
cong thanh » dong thanh, cong trinh, cong tan
chu xanh » chu manh, chieu xanh, chua xang
trang va » hang va
tran van » luan van
phan dau » phan tu
hang dau » hang va, hang tai
cho chu » cho thue

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho chu xanh - hanh ((trang va) OR (tran van)) thong cong thanh ((phan dau) or (hang dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho chu xanh - hanh ((trang va) OR (tran van)) thong cong thanh ((phan dau) OR (hang dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho chu xanh - hanh ((trang va) OR (tran van)) thong cong thanh ((phan dau) or (hang dau))".
• Adding a wildcard symbol may retrieve word variants: cho chu xanh - hanh ((trang va) OR (tran van)) thong cong thanh ((phan dau) or (hang dau))*.