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, mang xa
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
hieu ve » hieu va, hieu van
cau loc » hau loc, cau hoc, cau luc
va hanh » van hanh, va thanh, va danh
ve cau » ke cau, va cau, ve cac
loc va » hoc va, luc va

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) OR (nang ma)) hoi. hieu ve cau loc 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) OR (nang ma)) hoi. hieu ve cau loc 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) OR (nang ma)) hoi. hieu ve cau loc va hanh dai cua nuoc*".