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