Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nang xay » dang xay, nganh xay, nang xuan
hang vai » hang va, hang tai, hang hai
ban hang » ngan hang
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach ty
cau dua » cau qua, cau cua, cay dua
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ca dua » cay dua, ca cua, ca da

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang xay hoi. hieu va ((cau dua) or (ca dua)) ban hang vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xay hoi. hieu va ((cau dua) OR (ca dua)) ban hang vai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang xay hoi. hieu va ((cau dua) or (ca dua)) ban hang vai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xay hoi. hieu va ((cau dua) or (ca dua)) ban hang vai ((cua tre) OR (cuu tre))*.