Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh tang » hanh trang, hanh mang, nhanh thang
hanh tung » thanh tung, manh tung, hanh dung
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
anh tang » anh bang, anh dang, anh nang
cong anh » cong danh, dong anh, hong anh
tuan cu » tuan tu, quan cua, tuan thu

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