Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
trung cua » truong cua, trung tuan, trung cap
thanh tap » thanh lap, thanh tai, thanh tam
thanh tay » thanh tai, thanh toan, thanh thuy
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 - hanh ((tang cua) or (trung cua)) dung dan ban ((thanh tap) OR (thanh tay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((tang cua) OR (trung cua)) dung dan ban ((thanh tap) OR (thanh tay)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh ((tang cua) or (trung cua)) dung dan ban ((thanh tap) OR (thanh tay))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tang cua) or (trung cua)) dung dan ban ((thanh tap) OR (thanh tay))*.