Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
va thanh » gia thanh, ban thanh, va tinh
thanh ve » hanh ve, thanh va, thanh vien
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xang ha » lang ha, dang ha, hang ha
tang ha » lang ha, tang ma, trung ha
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
thuc va » thuc vat, thuc dan, thuc day
ve cua » le cua, de cua, te 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 ty ((xang ha) or (tang ha)) hoi. hieu ve tham thuc va thanh ve cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((xang ha) OR (tang ha)) hoi. hieu ve tham thuc va thanh ve cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((xang ha) or (tang ha)) hoi. hieu ve tham thuc va thanh ve cua viet*.