Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nghe lam » nghe dan, nghe va, nghe san
danh sai » danh bat, danh dau, hanh san
dung sai » dung tai, dung va, dung dat
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
thu xa » thu xac, thu ha, thu xe

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 nang ma hoa. hieu ((ha nam) or (nghe lam)) thu xa ((danh sai) OR (dung sai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoa. hieu ((ha nam) OR (nghe lam)) thu xa ((danh sai) OR (dung sai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ma hoa. hieu ((ha nam) or (nghe lam)) thu xa ((danh sai) OR (dung sai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoa. hieu ((ha nam) or (nghe lam)) thu xa ((danh sai) OR (dung sai)) cua tre*.