Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
doanh cua » doanh luan
thang cua » thong cua, hang cua, tang cua
manh cua » ban cua
cong van » cong vang, cong san, song van
than cua » nhan cua, thai cua, ban cua

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 xanh - canh ((manh cua) or (doanh cua)) thong cong van ((thang cua) OR (than cua))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh ((manh cua) OR (doanh cua)) thong cong van ((thang cua) OR (than cua)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh ((manh cua) or (doanh cua)) thong cong van ((thang cua) OR (than cua))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh ((manh cua) or (doanh cua)) thong cong van ((thang cua) OR (than cua))*.