Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
dua ban » dia ban, cua ban, qua ban
cuu tre » cua tre, cau tren, cau treo
nam dua » nam da, nam cua, nam mua
sach ky » sac ky, sach y, sach ty
cu tren » tu tren, dua tren
ma hoi » mai hoi, xa hoi, me hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (ma hoa)). thien van nam dua ban thanh vai ((cuu tre) OR (cu tren))~.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ma hoi) or (ma hoa)). thien van nam dua ban thanh vai ((cuu tre) or (cu tren))*.