Perhaps you should try some spelling variations:
thanh va » thanh van, thanh ha, thanh ve
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
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: vu sach ky tang xa hoi. hieu ((van nam) or (van lam)) xuc va ((thanh va) OR (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky tang xa hoi. hieu ((van nam) OR (van lam)) xuc va ((thanh va) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky tang xa hoi. hieu ((van nam) or (van lam)) xuc va ((thanh va) OR (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky tang xa hoi. hieu ((van nam) or (van lam)) xuc va ((thanh va) OR (hanh va)) cua tre*.