Perhaps you should try some spelling variations:
dieu cua » dieu tra
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
cuu ban » cuu van, cua ban, cuu san
ve cam » ve cham, ve cac, va cam
de cua » le cua, te cua

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 nang x ho. hieu ve cam ((xuc ban) or (cuu ban)) anh ((de cua) or (dieu cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x ho. hieu ve cam ((xuc ban) OR (cuu ban)) anh ((de cua) OR (dieu cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. hieu ve cam ((xuc ban) or (cuu ban)) anh ((de cua) or (dieu cua)) tre*.