Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
ke cau » ket cau
loc va » hoc va, luc va
ve cau » va cau, ve cac, le cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (te sach)) ky nang xa hoi. hieu ((ve cau) OR (ke cau)) loc va hanh dai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (te sach)) ky nang xa hoi. hieu ((ve cau) OR (ke cau)) loc va hanh dai cua thuoc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (te sach)) ky nang xa hoi. hieu ((ve cau) OR (ke cau)) loc va hanh dai cua thuoc*".