Perhaps you should try some spelling variations:
hoang thai » hoang hai, hong thai, hoang thanh
su sach » so sach, vu sach
soc ban » hoc ban, coc ban, so ban
va tham » van tham, va thanh, va thuat
va cham » va chat
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet

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 _ lang xa hoi. hieu ((va cham) OR (va tham)) soc ban ((hoang thai) or (hoang thi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach _ lang xa hoi. hieu ((va cham) OR (va tham)) soc ban ((hoang thai) OR (hoang thi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach _ lang xa hoi. hieu ((va cham) OR (va tham)) soc ban ((hoang thai) or (hoang thi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach _ lang xa hoi. hieu ((va cham) OR (va tham)) soc ban ((hoang thai) or (hoang thi)) cua tre*.