Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hien manh » hien hanh, tien manh, hieu manh
trinh vat » trinh van, trinh luat, sinh vat
lang nong » lang dong, lang song, lang vong
hang nong » thang long, han tong
dan chan » dan gian, dan ca, van chat
chan tu » phan tu, han tu, chon tu

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 - canh trinh vat ((lang nong) OR (hang nong)) dan chan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien manh - canh trinh vat ((lang nong) OR (hang nong)) dan chan tu*".