Perhaps you should try some spelling variations:
danh lai » danh sai, gianh lai, dinh lam
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cac hoc » cach hoc, cac hop, cac toc
bac hoc » bai hoc, bac ho
va danh » va dinh, va dan, va hanh
chau te » chau tho
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
ha hoi » hoa hoi, ha noi, xa hoi

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 ((y lang) OR (_ lang)) ha hoi. hieu ve ((cac hoc) or (bac hoc)) va danh lai chau te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y lang) OR (_ lang)) ha hoi. hieu ve ((cac hoc) OR (bac hoc)) va danh lai chau te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y lang) OR (_ lang)) ha hoi. hieu ve ((cac hoc) or (bac hoc)) va danh lai chau te".
• Adding a wildcard symbol may retrieve word variants: su sach ((y lang) OR (_ lang)) ha hoi. hieu ve ((cac hoc) or (bac hoc)) va danh lai chau te*.