Perhaps you should try some spelling variations:
danh lien » danh kien, doanh tien, doanh vien
danh dien » dinh dien, danh kien, nganh dien
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
hac thuc » hoc thuc, ha thuc, thach thuc
thuc va » thuc vat, thuc dan, thuc day
so sanh » do sanh
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
van hac » van hoc, van ha, van hai
sanh y » sinh y, anh y, hanh y

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh y ((nang xa) or (nang ma)) hoi. hieu van hac thuc va ((danh dien) or (danh lien)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y ((nang xa) OR (nang ma)) hoi. hieu van hac thuc va ((danh dien) OR (danh lien)) cau tren.
• Adding a wildcard symbol may retrieve word variants: so sanh y ((nang xa) or (nang ma)) hoi. hieu van hac thuc va ((danh dien) or (danh lien)) cau tren*.