Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh hung » thanh huong, thanh tung, thanh cong
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh tang » hanh trang, hanh mang, hanh tung
doan toan » dan toan, doan tuan, doanh hoan
anh tang » anh bang, anh dang, anh nang
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 tang) or (anh tang)) gia ((thanh hung) OR (thanh trung)) doan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hanh tang) OR (anh tang)) gia ((thanh hung) OR (thanh trung)) doan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((hanh tang) or (anh tang)) gia ((thanh hung) OR (thanh trung)) doan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hanh tang) or (anh tang)) gia ((thanh hung) OR (thanh trung)) doan toan ban*.