Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
nang tai » hang tai, tang tai, sang tai
tai khoa » da khoa, noi khoa
vai cuu » vai cua
dua ban » dia ban, cua ban, qua ban
cuu tre » cua tre, cau tren, cau treo
va cao » va cac, va co, va dao
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ky nang tai khoa. hieu ((ve cam) or (va cao)) dua ban thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang tai khoa. hieu ((ve cam) OR (va cao)) dua ban thanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky nang tai khoa. hieu ((ve cam) or (va cao)) dua ban thanh vai cuu tre*.