Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
thu hang » thi hang, thuc hanh, thu huong
tinh vai » tinh va, tinh hai, tinh bai
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
hieu ve » hieu va, hieu van
ty hang » ly hang, thi hang
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc 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: hoc sach ((ty xang) or (((ty hang) OR (thu hang)))) xa hoi. hieu ve cam xuc va tinh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ty xang) OR (((ty hang) OR (thu hang)))) xa hoi. hieu ve cam xuc va tinh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((ty xang) or (((ty hang) OR (thu hang)))) xa hoi. hieu ve cam xuc va tinh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ty xang) or (((ty hang) OR (thu hang)))) xa hoi. hieu ve cam xuc va tinh vai cua tre*.