Perhaps you should try some spelling variations:
danh dien » dinh dien, danh kien, danh lien
tang van » dang van, hoang van, trong van
cac thuc » cach thuc, cac thu, cay thuc
can thuc » dan thuc, van thuc, cay thuc
dien cua » dieu cua, dien cuc, dien cu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
van hoc » van hoa
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky tang van hoc. hieu va ((cac thuc) OR (can thuc)) va danh dien cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky tang van hoc. hieu va ((cac thuc) OR (can thuc)) va danh dien cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky tang van hoc. hieu va ((cac thuc) OR (can thuc)) va danh dien cua tre*.