Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
dang xa » dang xay, lang xa, dang ha
vu dang » su dang, vu quang, cua dang
loc va » hoc va, luc va
de cua » le cua, te cua, dieu cua
va cam » va cham, va cao, va cai

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)) vu dang xa hoi. hieu ((va cam) OR (va cac)) loc va hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) vu dang xa hoi. hieu ((va cam) OR (va cac)) loc va hanh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (thuoc sach)) vu dang xa hoi. hieu ((va cam) OR (va cac)) loc va hanh de cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuoc sach)) vu dang xa hoi. hieu ((va cam) OR (va cac)) loc va hanh de cua tre*.