Perhaps you should try some spelling variations:
gianh lai » gian lan
va gianh » va gian, van giang, va giai
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cac hoc » cach hoc, bac hoc, cac toc
lai cua » dai cua, hai cua, lai chau
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
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: su sach ((y lang) OR (_ lang)) xa hoi. hieu ve ((cac hoc) or (cac hop)) va gianh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y lang) OR (_ lang)) xa hoi. hieu ve ((cac hoc) OR (cac hop)) va gianh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y lang) OR (_ lang)) xa hoi. hieu ve ((cac hoc) or (cac hop)) va gianh lai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((y lang) OR (_ lang)) xa hoi. hieu ve ((cac hoc) or (cac hop)) va gianh lai cua te*.