Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
hoang dau » hoang da, hoang dai, hoang dat
hang dau » hang va, hang tai
thuc van » thuc vat, thuc dan, thuc va
va triet » va thiet, va trien, ve triet
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. hieu ve cham thuc van ((hoang dau) or (hang dau)) ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu ve cham thuc van ((hoang dau) OR (hang dau)) ((cua tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu ve cham thuc van ((hoang dau) or (hang dau)) ((cua tre) or (va triet))*.