Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu sau » hieu suat, tieu su, hieu va
dua tren » dung tren
van tuan » van quan, van ban, anh tuan
cham xuc » cam xuc, chat xuc, cham soc
hieu su » tieu su, hieu so, hieu suat
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, vuc van
tang ha » lang ha, tang ma, trung ha
tuan te » tuan le, tuan ts, tuan tu
ky tang » ky nang, ky dang, kho tang
cuu tre » cua tre, cau tren, cau treo

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 ky tang ha noi. ((hieu su) OR (hieu sau)) cham xuc van tuan te ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang ha noi. ((hieu su) OR (hieu sau)) cham xuc van tuan te ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang ha noi. ((hieu su) OR (hieu sau)) cham xuc van tuan te ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang ha noi. ((hieu su) OR (hieu sau)) cham xuc van tuan te ((dua tren) or (cuu tre))*.