Perhaps you should try some spelling variations:
tinh voi » trinh voi, tinh doi, binh voi
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
cao loc » cao hoc, cao toc, cao oc
tinh vi » trinh vi, tinh va, dinh vi
va cao » va cac, va co, va dao
loc va » hoc va, luc va
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: so sach ky dang xa hoi. hieu va cao loc va ((tinh vi) OR (tinh voi)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang xa hoi. hieu va cao loc va ((tinh vi) OR (tinh voi)) cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. hieu va cao loc va ((tinh vi) OR (tinh voi)) cua te*.