Perhaps you should try some spelling variations:
hien manh » hien hanh, tien manh, hieu manh
anh trinh » hanh trinh, anh tinh, thanh trinh
canh tinh » hanh tinh, manh tinh, canh tranh
lang nong » hang nong, lang dong, lang song
vat lang » va lang, van lang, vat mang
nong dan » cong dan, nong san, nguong dan
dan phan » doan phan, dan chan, van phan

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 manh - ((anh trinh) or (canh tinh)) vat lang nong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - ((anh trinh) OR (canh tinh)) vat lang nong dan phan tu*.