Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban thanh » ban hanh, ban hang
thanh dai » thanh hai, thanh tai, thanh dat
dang xay » dang van
hieu van » hieu va, thien van, lieu va
van chay » van chat, san chay, toan chay
sach ky » sac ky, sach y, sach ty
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky ((dang xay) OR (van xay)) hoi. hieu van chay dua ban thanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky ((dang xay) OR (van xay)) hoi. hieu van chay dua ban thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((dang xay) OR (van xay)) hoi. hieu van chay dua ban thanh dai cua tre*.