Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
quy sinh » quy dinh, huy sinh, quy ninh
cua tre » cuu tre, cua triet, dua tren
duc quy » duc duy, duc huy, duy quy
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
ma hoi » mai hoi, ma hoa, me hoi
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: toc sach ty nang ((ma hoi) OR (xa hoi)). hieu ve cac duc quy sinh vien ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang ((ma hoi) OR (xa hoi)). hieu ve cac duc quy sinh vien ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang ((ma hoi) OR (xa hoi)). hieu ve cac duc quy sinh vien ((cua tre) or (cua te))*".