Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
su sach » so sach, vu sach
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
xu lang » cu lang, xu dang, xu quang
tu lang » cu lang, tu lanh, tu quang
cua tre » cua te, cuu tre, cua triet

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 ((tu lang) OR (xu lang)) xa hoi. hieu ve pham duc va ((hanh lai) or (hanh lam)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu lang) OR (xu lang)) xa hoi. hieu ve pham duc va ((hanh lai) OR (hanh lam)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu lang) OR (xu lang)) xa hoi. hieu ve pham duc va ((hanh lai) or (hanh lam)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu lang) OR (xu lang)) xa hoi. hieu ve pham duc va ((hanh lai) or (hanh lam)) cua tre*.