Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
ban hanh » ban hang
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach ty
qua cam » qua cham, qua cac, qua ca
ky cong » ke cong, ly cong, khu cong
ha hoi » hoa hoi, xa hoi, va hoi
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ky cong ((ha hoi) or (ha noi)). hieu qua cam xuc ((ban hanh) or (va danh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky cong ((ha hoi) OR (ha noi)). hieu qua cam xuc ((ban hanh) OR (va danh)) vi cua te.
• Adding a wildcard symbol may retrieve word variants: doc sach ky cong ((ha hoi) or (ha noi)). hieu qua cam xuc ((ban hanh) or (va danh)) vi cua te*.