Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
trung ha » trung hoc, trung tam, trung cap
trung va » truong va, trang va, trung tam
toc sach » hoc sach, doc sach, nuoc sach
hieu ve » hieu va, hieu van
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
di cua » dai cua, doi cua, de cua
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: ((toc sach) OR (thuoc sach)) ky nang x hoi. hieu ve cau ((trung va) or (trung ha)) danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) ky nang x hoi. hieu ve cau ((trung va) OR (trung ha)) danh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ky nang x hoi. hieu ve cau ((trung va) or (trung ha)) danh di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) ky nang x hoi. hieu ve cau ((trung va) or (trung ha)) danh di cua tre*.