Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
sach ly » sach y, sach lo, sach hay
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
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: vu ((sach ly) or (sach ty)) lang xa hoi. hieu va cac luc va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ly) OR (sach ty)) lang xa hoi. hieu va cac luc va hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ly) or (sach ty)) lang xa hoi. hieu va cac luc va hanh tai cua tre*.