Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
danh doi » danh di, dung doi, danh hoa
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
y lang » o lang, _ lang, tay lang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y lang xa hoi. hieu van cam thuc vat ((danh doi) or (thanh doi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y lang xa hoi. hieu van cam thuc vat ((danh doi) OR (thanh doi)) cua tu.
• Adding a wildcard symbol may retrieve word variants: so sach y lang xa hoi. hieu van cam thuc vat ((danh doi) or (thanh doi)) cua tu*.