Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
dang xa » dang xay, lang xa, dang ha
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
y dang » ky dang, 2 dang, _ dang
nam tu » nam thu, nam thuc
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (thuoc sach)) y dang xa hoi. hieu van nam tu va hanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) y dang xa hoi. hieu van nam tu va hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) y dang xa hoi. hieu van nam tu va hanh tai cua te*.