Perhaps you should try some spelling variations:
bo sach » co sach, hoc sach
han tai » hang tai, nhan tai, van tai
cau luc » cau truc, cau phuc
cam luc » cam xuc
hieu ve » hieu va, hieu van
cuc tre » duc tre, cua tre, cuu tre
ly hang » ly quang
y hang » ty hang, yu hang, _ hang
va han » va phan, van han, va hanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ((y hang) or (ly hang)) xa hoi. hieu ve ((cam luc) OR (cau luc)) va han tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ((y hang) OR (ly hang)) xa hoi. hieu ve ((cam luc) OR (cau luc)) va han tai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ((y hang) or (ly hang)) xa hoi. hieu ve ((cam luc) OR (cau luc)) va han tai cuc tre*".