Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
gian cua » gian xu, ban cua
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
va chat » van chat, va phat, cao chat
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
ty hang » ly hang, ty xang, thi hang
loc va » hoc va, luc va

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 ty hang ((xa hoi) or (cau hoi)). hieu ((ve cham) or (va chat)) loc va thanh gian cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty hang ((xa hoi) OR (cau hoi)). hieu ((ve cham) OR (va chat)) loc va thanh gian cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang ((xa hoi) or (cau hoi)). hieu ((ve cham) or (va chat)) loc va thanh gian cua tre*.