Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chat thuc » thuat thuc, nhan thuc, chat thai
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat

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) or (thuoc sach)) ky nang x ho. hieu ve chat thuc day hanh ((vi luu) or (vi lua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuoc sach)) ky nang x ho. hieu ve chat thuc day hanh ((vi luu) OR (vi lua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuoc sach)) ky nang x ho. hieu ve chat thuc day hanh ((vi luu) or (vi lua)) tre*.