Perhaps you should try some spelling variations:
thanh tac » thanh tai, thanh tay, thanh tam
thien van » thi van
quan tre » quan tren, quan tri, quang tri
van cham » van chat, van tham, va cham
nang co » nang cao, nang doc, nang noi
sach ky » sach y, sach ty, sach kem
co loi » co hoi
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang co loi. thien van cham ((xuc va) OR (luc va)) thanh tac quan tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang co loi. thien van cham ((xuc va) or (luc va)) thanh tac quan tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang co loi. thien van cham ((xuc va) or (luc va)) thanh tac quan tre*.