Perhaps you should try some spelling variations:
sach nuoc » sach duoc, cac nuoc, bach tuoc
hieu hien » bieu hien, dieu hien, chieu chien
su triet » su viet, su tien, ve triet
danh doi » danh di, thanh doi, dung doi
cua tre » cua te, cuu tre, cua triet
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma

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 nang xa hoi. ((hieu hien) or (hieu ve)) sach nuoc va danh doi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu hien) OR (hieu ve)) sach nuoc va danh doi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu hien) or (hieu ve)) sach nuoc va danh doi ((cua tre) or (su triet))*.