Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
viet dat » viec dat, viet da, viet dao
dat tren » dat trong, dua tren
lang ha » long ha
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
y lang » o lang, _ lang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
va cau » van cau, va cac, va dau
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y lang ha hoi. hieu ((va cau) or (va dao)) ((xuc van) or (duc van)) anh viet dat tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y lang ha hoi. hieu ((va cau) OR (va dao)) ((xuc van) OR (duc van)) anh viet dat tren.
• Adding a wildcard symbol may retrieve word variants: thu sach y lang ha hoi. hieu ((va cau) or (va dao)) ((xuc van) or (duc van)) anh viet dat tren*.