Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
cam tu » cam thu, nam tu, dam tu
y dang » ky dang, 2 dang, _ dang
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) y dang xay hoi. hieu ve cam tu va hanh vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y dang xay hoi. hieu ve cam tu va hanh vai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) y dang xay hoi. hieu ve cam tu va hanh vai ((cua tre) OR (cuu tre))*".