Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach hay » sach han, sach ha, sach nay
hay lang » ha lang, tay lang, nhan lang
hieu thi » sieu thi, hieu chi, kieu thi
hiep thi » tiep thi, dien thi, giap thi
chat duc » chat xuc, chat doc, chet duoc
van hanh » van thanh, ban hanh, van anh
lang xa » lang ha, dang xay, lang van
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach hay lang xa hoi. ((hieu thi) OR (hiep thi)) chat duc van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach hay lang xa hoi. ((hieu thi) OR (hiep thi)) chat duc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach hay lang xa hoi. ((hieu thi) OR (hiep thi)) chat duc van hanh vi cua tre*.