Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
dua tren » dung tren
thu sach » thuat sach, thuoc sach, thu hoach
dang mat » dang vat, dang mau, dung mat
hieu van » hieu va, thien van, lieu va
dua ban » dia ban, cua ban, qua ban
cuu tre » cua tre, cau tren, cau treo
tu sach » su sach, te sach, tu cach
mat hoa » ma hoa, mai hoa, chat hoa
ky dang » ky nang, ky danh
ca dua » cay dua, ca cua, ca da
van ca » van cau, van cua, dan ca

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) OR (thu sach)) ky dang mat hoa. hieu van ca dua ban thanh vai ((cuu tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky dang mat hoa. hieu van ca dua ban thanh vai ((cuu tre) OR (dua tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky dang mat hoa. hieu van ca dua ban thanh vai ((cuu tre) or (dua tren))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky dang mat hoa. hieu van ca dua ban thanh vai ((cuu tre) or (dua tren))*.