Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
thang cua » thong cua, hang cua, tang cua
tranh cua » doanh cua, manh cua
dung cong » dung trong
than cua » nhan cua, thai cua, ban cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: hoc hien xanh - hanh ((((thang cua) OR (than cua))) or (tranh cua)) dung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((((thang cua) OR (than cua))) OR (tranh cua)) dung cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((((thang cua) OR (than cua))) or (tranh cua)) dung cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((((thang cua) OR (than cua))) or (tranh cua)) dung cong dan toan ban*.