Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
lieu van » hieu van, sieu van, lieu nano
hanh vai » hanh va, hanh tai, hanh van
sach ly » sach y, sach lo, sach ty
ly lang » ly hang, ly vang, le lang
lang xa » lang ha, dang xay, lang van
chu duc » thu duc, chua duoc, cuu duoc
cuu tre » cua tre, cau tren, cau treo

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

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