Perhaps you should try some spelling variations:
phan thuc » nhan thuc, phap thuc, pham thuc
day thanh » dao thanh, dat thanh, da thanh
may nang » may nong, ky nang, cam nang
thuc day » thuc dan, thuc vat
so canh » so sanh, bo canh, do canh
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
so danh » do danh, so sanh, so dan
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so canh) OR (so danh)) may nang o hoi. hieu ve phan thuc day thanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so canh) OR (so danh)) may nang o hoi. hieu ve phan thuc day thanh ((vai cua) OR (lai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so canh) OR (so danh)) may nang o hoi. hieu ve phan thuc day thanh ((vai cua) or (lai cua)) tre*".