Perhaps you should try some spelling variations:
lang hai » lang chai, lang thai, lang ha
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
tu sach » thu sach, su sach, te sach
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
hai moi » hai muoi, dai moi, nhat moi
ky lang » ky nang, ky dang, ky tang
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai

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 lang hai moi. hieu ((ve cam) or (va cam)) luc ((van hanh) OR (ban hanh)) tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang hai moi. hieu ((ve cam) OR (va cam)) luc ((van hanh) OR (ban hanh)) tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang hai moi. hieu ((ve cam) or (va cam)) luc ((van hanh) OR (ban hanh)) tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang hai moi. hieu ((ve cam) or (va cam)) luc ((van hanh) OR (ban hanh)) tai cuu tre*.