Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
ky dinh » ky sinh, ky danh, ky kinh
van hoc » van hoa
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
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: ((((te sach) or (toc sach))) or (thu sach)) ky dinh van hoc. hieu van cam xuc va hanh tai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((te sach) OR (toc sach))) OR (thu sach)) ky dinh van hoc. hieu van cam xuc va hanh tai cua vat.
• Adding a wildcard symbol may retrieve word variants: ((((te sach) or (toc sach))) or (thu sach)) ky dinh van hoc. hieu van cam xuc va hanh tai cua vat*.