Perhaps you should try some spelling variations:
cao thuoc » cay thuoc, cua thuoc, nam thuoc
cao thuc » bao thuc, can thuc, cao thu
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
vai cua » hai cua, lai cua, bai cua
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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 x hoi. lieu va ((cao thuc) or (cao thuoc)) va thanh ((vai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. lieu va ((cao thuc) OR (cao thuoc)) va thanh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. lieu va ((cao thuc) or (cao thuoc)) va thanh ((vai cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. lieu va ((cao thuc) or (cao thuoc)) va thanh ((vai cua) OR (dai cua)) tre*.