Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
chat soc » cham soc, chat doc, chat song
chat hoc » chat hoa, chat thom, cho hoc
danh sai » dung sai, danh bat, danh dau
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
va danh » va dinh, va dan, va hanh
sai cua » dai cua, hai cua, lai cua

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 ky) or (sach y)) lang xa hoi. hieu van ((chat soc) OR (chat hoc)) va danh sai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) lang xa hoi. hieu van ((chat soc) OR (chat hoc)) va danh sai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) lang xa hoi. hieu van ((chat soc) OR (chat hoc)) va danh sai cua vat".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) lang xa hoi. hieu van ((chat soc) OR (chat hoc)) va danh sai cua vat*.