Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
van cam » van nam, van lam, van dam
sang xa » song xa, lang xa, sang ma
ky sang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky sang xa hoi. hieu ((van cam) OR (van cau)) xuc va ((hanh tai) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang xa hoi. hieu ((van cam) OR (van cau)) xuc va ((hanh tai) OR (hanh vi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang xa hoi. hieu ((van cam) OR (van cau)) xuc va ((hanh tai) or (hanh vi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang xa hoi. hieu ((van cam) OR (van cau)) xuc va ((hanh tai) or (hanh vi)) cuu tre*.