Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hay lang » tay lang, nhan lang, phap lang
hieu thi » sieu thi, hieu chi, hiep thi
thi chat » thi cham, tri chat, thi chap
ha lang » hoa lang, ha tang, va lang
xuc van » luc van, vuc van, xuc ban
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) OR (ha lang)) xa hoi. hieu thi chat ((xuc van) or (duc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((hay lang) OR (ha lang)) xa hoi. hieu thi chat ((xuc van) OR (duc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((hay lang) OR (ha lang)) xa hoi. hieu thi chat ((xuc van) or (duc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((hay lang) OR (ha lang)) xa hoi. hieu thi chat ((xuc van) or (duc van)) hanh vi cua tre*.