Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
danh tai » doanh tai, dinh tai, hanh tai
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
cuc tre » duc tre, cuu tre, cuc thue
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
o hoi » co hoi, o hoc, o hai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang o hoi. hieu va cam thuc va danh tai ((cuc tre) OR (cua tre))~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hoi. hieu va cam thuc va danh tai ((cuc tre) or (cua tre))*.