Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
hanh lai » hanh lam, hanh tai, thanh loi
lang dai » lang hai, lang mai, lang chai
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach kem
dai hoi » dai hoc, dai hai, dai moi
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) OR (sach ty)) lang dai hoi. hieu va cac luc va ((hanh lai) or (thanh lap)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) lang dai hoi. hieu va cac luc va ((hanh lai) OR (thanh lap)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) lang dai hoi. hieu va cac luc va ((hanh lai) or (thanh lap)) cua tre*".