Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
trang cua » tranh cua, tang cua, thang cua
trung cua » truong cua, trung tuan, trung cap
van thanh » ban thanh, van tuan
thanh tap » thanh lap, thanh tai, thanh tay
dung dan » dung dat, dung san, tung dan
dan van » dang van, doan van, dao van

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