Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
dieu cua » dieu tra
te sach » toc sach
sach lo » sach dao, sach doi, sach hoi
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
ve nham » ve nha, ve cham
hieu ve » hieu va, hieu van
tang ma » tang van
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach lo ((tang ma) OR (mang may)) hoi. hieu ve nham thuc va danh ((di cua) or (dieu cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach lo ((tang ma) OR (mang may)) hoi. hieu ve nham thuc va danh ((di cua) OR (dieu cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach lo ((tang ma) OR (mang may)) hoi. hieu ve nham thuc va danh ((di cua) or (dieu cua)) te*".