Perhaps you should try some spelling variations:
gianh lai » gian lan
va gianh » va gian, van giang, va giai
lang dai » lang hai, lang mai, lang chai
lai cua » dai cua, hai cua, lai chau
cac luc » cau luc, coc luc, cac nuoc
sach ky » sach y, sach ty, sach kem
hieu va » hieu qua
dai hoi » dai hoc, dai hai, dai moi
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky

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 (sac ky)) lang dai hoi. ((hieu va) or (lieu va)) cac luc va gianh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) lang dai hoi. ((hieu va) OR (lieu va)) cac luc va gianh lai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sac ky)) lang dai hoi. ((hieu va) or (lieu va)) cac luc va gianh lai cua tre*".