Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
dua tren » dung tren
tinh lai » tinh lao, tinh hai, minh lai
cham xuc » cam xuc, chat xuc, cham soc
lang hai » lang chai, lang thai, lang ha
hieu ve » hieu va
sach ty » sach y, sach tu, sach thu
hai hoi » dai hoi, hai moi, hai hai
va tinh » may tinh
ty lang » tay lang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc va

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 ty lang hai hoi. ((hieu ve) OR (hieu van)) cham xuc va tinh lai ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty lang hai hoi. ((hieu ve) OR (hieu van)) cham xuc va tinh lai ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty lang hai hoi. ((hieu ve) OR (hieu van)) cham xuc va tinh lai ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty lang hai hoi. ((hieu ve) OR (hieu van)) cham xuc va tinh lai ((dua tren) or (cuu tre))*.