Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh tang » hanh trang, hanh mang, hanh tung
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 thu » toan thuc, van 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 (anh tang)) quan dung cong anh tuan thu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hanh tang) OR (anh tang)) quan dung cong anh tuan thu.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hanh tang) or (anh tang)) quan dung cong anh tuan thu*.