Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh dai » hanh tai, hanh dao, vanh dai
cua nuoc » cua quoc, cua nguoi, cua thuoc
nang xa » nang x, lang xa, nang ma
te sach » toc sach
hieu ve » hieu va, hieu van
loc va » hoc va
luc va » duc va, tuc va
ve cau » ke cau, va cau, ve cac

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 ((loc va) OR (luc va)) hanh dai cua nuoc~.
• 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 ((loc va) OR (luc va)) hanh dai cua nuoc*.
• 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 ((loc va) OR (luc va)) hanh dai cua nuoc*".