Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec sach » viet sach, vien bach, dien sach
sach nuoc » sach duoc, cac nuoc, bach tuoc
cua triet » cua viet, su triet
xanh doi » xanh di, thanh doi, tinh doi
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va xanh » va danh, va hanh, va anh

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 viec sach nuoc va xanh doi ((cua triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu viec sach nuoc va xanh doi ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu viec sach nuoc va xanh doi ((cua triet) OR (va triet))*.