Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
nang mai » nang ma, lang mai, nang cai
nang tai » hang tai, tang tai, sang tai
tu sach » thu sach, su sach, te sach
cua tre » cuu tre, cua triet, dua tren
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cam dua » ca dua, cay dua, chay dua
dua ban » dia ban, cua ban, qua ban
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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 mai) or (nang tai)) hoi. hieu ve cam dua ban thanh vai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang mai) OR (nang tai)) hoi. hieu ve cam dua ban thanh vai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang mai) or (nang tai)) hoi. hieu ve cam dua ban thanh vai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang mai) or (nang tai)) hoi. hieu ve cam dua ban thanh vai ((cua tre) OR (cua te))*.