Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
van quan » van ban
quan lai » quan li, quan tai, quan hai
sach ty » sach y, sach tu, xach tay
lang xa » lang ha, dang xay, lang van
duc van » duc va, duc tan, duc manh
lai cuu » lai cua, lai chau, lai cuoc
cuu tre » cua tre, cau tren, cau treo
va nam » ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) OR (sach thu)) lang xa hoi. hieu ((va nam) or (van nam)) duc van quan lai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) lang xa hoi. hieu ((va nam) OR (van nam)) duc van quan lai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach thu)) lang xa hoi. hieu ((va nam) or (van nam)) duc van quan lai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach thu)) lang xa hoi. hieu ((va nam) or (van nam)) duc van quan lai cuu tre*.