Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
nang mai » nang ma, nang tai, lang mai
sach ty » sach y, sach thu, xach tay
hai cuc » tai cuc, hai cua, thai cua
dua ban » dia ban, cua ban, qua ban
cuc tre » duc tre, cua tre, cuu tre
mai hoi » mai khoi, dai hoi, lai hoi
sach tu » sach thu, cach tu, sach uu
va cay » va cac, va cao, va cai
ve cay » ve cac, ve cai, ve cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) or (sach tu)) nang mai hoi. hieu ((ve cay) OR (va cay)) dua ban thanh hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach tu)) nang mai hoi. hieu ((ve cay) OR (va cay)) dua ban thanh hai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) or (sach tu)) nang mai hoi. hieu ((ve cay) OR (va cay)) dua ban thanh hai cuc tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach tu)) nang mai hoi. hieu ((ve cay) OR (va cay)) dua ban thanh hai cuc tre*.