Perhaps you should try some spelling variations:
nang xay » dang xay, nganh xay, nang xuan
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
tuc van » thuc van, truc van, tuc va
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xay hoi. hieu ((va cam) or (va cao)) tuc van hanh tai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xay hoi. hieu ((va cam) OR (va cao)) tuc van hanh tai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xay hoi. hieu ((va cam) or (va cao)) tuc van hanh tai ((cua tre) or (cuu tre))*.