Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
sach ly » sach y, sach lo, sach hay
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
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: vu ((sach ly) or (sach ty)) lang xa hoi. hieu va cac luc va ((hanh tai) OR (hang 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) OR (hang tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ly) or (sach ty)) lang xa hoi. hieu va cac luc va ((hanh tai) OR (hang 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) OR (hang tai)) cua tre*.