Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
va thanh » gia thanh, ban thanh, va tinh
thanh le » thinh le, thanh ve, thanh de
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xang ha » lang ha, tang ha, dang ha
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
thuc va » thuc vat, thuc dan, thuc day
ca viet » va viet, co viet, hoa viet
ha hoi » hoa hoi, ha noi, xa hoi

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 hoi. hieu ve cham thuc va thanh le ((ca viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang ha hoi. hieu ve cham thuc va thanh le ((ca viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: te sach ty xang ha hoi. hieu ve cham thuc va thanh le ((ca viet) or (cua vat))*.