Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
vu sach » vu bach, su sach, vu khach
dam cua » dai cua, day cua, nam cua
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ly lang » ly hang, ly vang, le lang
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
luc va » tuc va, loc 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) or (so sach)) ly lang xa hoi. hieu ve cac ((luc va) OR (duc va)) thanh dam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ly lang xa hoi. hieu ve cac ((luc va) OR (duc va)) thanh dam cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (so sach)) ly lang xa hoi. hieu ve cac ((luc va) OR (duc va)) thanh dam cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) ly lang xa hoi. hieu ve cac ((luc va) OR (duc va)) thanh dam cua tre*.