Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
voi nhat » moi nhat, hoi nhap, do nhat
hanh van » thanh van, khanh van, hanh va
cao hoi » cau hoi, co hoi, cao hoc
vi nham » vi pham, vi tham, kim nham
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
van su » dan su

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 y nang cao hoi. hieu ((vi nham) or (voi nhat)) thuc va hanh van su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach y nang cao hoi. hieu ((vi nham) OR (voi nhat)) thuc va hanh van su tien.
• Adding a wildcard symbol may retrieve word variants: doc sach y nang cao hoi. hieu ((vi nham) or (voi nhat)) thuc va hanh van su tien*.