Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hoc sach » hoc sinh, hoc cac, hoc anh
nang mai » nang ma, nang tai, lang mai
hai cuc » tai cuc, hai cua, thai cua
qua ban » cua ban, qua quan
dua ban » dia ban, cua ban, mua ban
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
cuc tre » duc tre, cua tre, cuu tre
ve cam » ve cac, va cam, 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: hoc sach ty nang mai hoi. hieu ((ve cam) OR (ve cham)) ((dua ban) or (qua ban)) thanh hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty nang mai hoi. hieu ((ve cam) OR (ve cham)) ((dua ban) OR (qua ban)) thanh hai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ty nang mai hoi. hieu ((ve cam) OR (ve cham)) ((dua ban) or (qua ban)) thanh hai cuc tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ty nang mai hoi. hieu ((ve cam) OR (ve cham)) ((dua ban) or (qua ban)) thanh hai cuc tre*.