Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
thanh de » hanh de, thanh ve, thanh do
va thanh » gia thanh, ban thanh, va tinh
sach thu » sach thue, sach thieu, sach tham
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu van
sach ty » sach y, sach tu, xach tay
xang ha » lang ha, tang ha, dang ha
ha hoi » hoa hoi, ha noi, xa hoi
de cua » le cua, te cua, dieu 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) or (sach thu)) xang ha hoi. ((hieu ve) OR (hieu va)) cham thuc va thanh de cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) xang ha hoi. ((hieu ve) OR (hieu va)) cham thuc va thanh de cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach thu)) xang ha hoi. ((hieu ve) OR (hieu va)) cham thuc va thanh de cua vat".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) xang ha hoi. ((hieu ve) OR (hieu va)) cham thuc va thanh de cua vat*.