Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
vai cuu » vai cua
xa hanh » xa thanh, xa khanh, va hanh
truc xa » tuc xa, truc va, truoc xay
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
va nay » va ngay, va cay
ma hoi » mai hoi, xa hoi, me hoi
va nam » van nam, ha nam

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 ky nang ((ma hoi) or (ma hoa)). hieu ((va nam) OR (va nay)) truc xa hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ma hoi) OR (ma hoa)). hieu ((va nam) OR (va nay)) truc xa hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) or (ma hoa)). hieu ((va nam) OR (va nay)) truc xa hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) or (ma hoa)). hieu ((va nam) OR (va nay)) truc xa hanh vai cuu tre*.