Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
danh doi » danh di, thanh doi, dung doi
doi cua » dai cua, hoi cua
xa danh » va danh, dia danh, nam danh
cac toc » cac toi, cac nuoc, cac thoi
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
toc xa » tuc xa, toc ta, hoc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky sang) or (ky tang)) ma hoi. ((hieu van) or (hieu va)) cac toc xa danh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky tang)) ma hoi. ((hieu van) OR (hieu va)) cac toc xa danh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) or (ky tang)) ma hoi. ((hieu van) or (hieu va)) cac toc xa danh doi cua tre*.