Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang di » nang du, hang di, nang ji
va nang » van nang, da nang, cam nang
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
bo sach » co sach, hoc sach
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua
ve cam » ve cham, va cam, ve cai

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) or (bo sach)) ky lang xa hoi. hieu ((ve cam) OR (ve cac)) tuc va nang di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (bo sach)) ky lang xa hoi. hieu ((ve cam) OR (ve cac)) tuc va nang di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (bo sach)) ky lang xa hoi. hieu ((ve cam) OR (ve cac)) tuc va nang di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (bo sach)) ky lang xa hoi. hieu ((ve cam) OR (ve cac)) tuc va nang di cua tre*.