Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
banh keo » hanh kem, benh kho
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
cam duc » cam xuc, cao duc, pham duc
va banh » va ban, va danh, va hanh
keo hoa » ket hoa, kien hoa, kieu hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang xa hoi. ((lieu va) or (hieu va)) cam duc va banh keo hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. ((lieu va) OR (hieu va)) cam duc va banh keo hoa viet.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. ((lieu va) or (hieu va)) cam duc va banh keo hoa viet*.