Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
thang cua » thong cua, hang cua, than cua
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
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 (tranh cua)) tong cong dan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((thang cua) OR (tranh cua)) tong cong dan toan ban*".