Perhaps you should try some spelling variations:
sach thame » sach thue
sach tham » sach nha
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
cao hoi » cau hoi, co hoi, cao hoc
do van » dao van, vo van, so van
cua te » cua tu
do va » so va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach tham) or (sach thame)) nang cao hoi. hieu ve chat ((do va) or (do van)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach tham) OR (sach thame)) nang cao hoi. hieu ve chat ((do va) OR (do van)) hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: thu ((sach tham) or (sach thame)) nang cao hoi. hieu ve chat ((do va) or (do van)) hanh vai cua te*.