Perhaps you should try some spelling variations:
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
ban thanh » ban hanh, ban hang
thanh tap » thanh lap, thanh tai, thanh tay
tang cua » mang cua, hang cua, tang luan
dung dan » dung dat, dung san, tung dan
dan ban » van ban, can ban, dan ba

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) OR (hien hanh)) - hanh ((tang cua) or (trung cua)) dung dan ban thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh ((tang cua) OR (trung cua)) dung dan ban thanh tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - hanh ((tang cua) or (trung cua)) dung dan ban thanh tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - hanh ((tang cua) or (trung cua)) dung dan ban thanh tap*.