Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
xuc ban » duc ban, cuc ban, quoc ban
xuc van » duc van, luc van, thuc van
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
va cuu » va cau, va chu, va huu

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 thu ((nang ma) or (nang x)) hoi. hieu ve cam ((xuc van) or (xuc ban)) hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((nang ma) OR (nang x)) hoi. hieu ve cam ((xuc van) OR (xuc ban)) hanh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((nang ma) or (nang x)) hoi. hieu ve cam ((xuc van) or (xuc ban)) hanh va cuu tre*.