Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dang xay » dang van, van xay
cac truc » cau truc, cac tru, cac trung
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, lang van
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky ((dang xay) or (lang xa)) hoi. hieu ve cac truc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((dang xay) OR (lang xa)) hoi. hieu ve cac truc va danh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((dang xay) or (lang xa)) hoi. hieu ve cac truc va danh vi cua tre*.