Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thanh tung » thanh cong
hieu xanh » chieu xanh, hieu manh, dieu hanh
hang nong » thang long, han tong
nong nang » dong nang, cong ngang, thong nang
nang phat » nang suat, van phat
tung va » trung va, tuong va, dung va
va hang » van hang, va nang, va lang
phat tu » phan tu, pham tu, phap tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (hieu nganh)) - thanh tung va hang nong nang phat tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu nganh)) - thanh tung va hang nong nang phat tu.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu nganh)) - thanh tung va hang nong nang phat tu*.