Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
trong san » trong cac, cong san, dong san
hoc hieu » hoc thieu, hoc hien, doc hieu
nong sat » nong san, cong suat, duong sat
qua dung » quang dung, su dung, qua song
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac
sat qua » mat qua, sat quang, hat quan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - nong sat qua dung trong san than cap~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - nong sat qua dung trong san than cap*.