Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
tu nang » tru nang, tu nong, tu nano
te sach » toc sach
lo van » le van, vo van, so van
va cua » va chua, via cua, ca cua
ve cam » ve cham, ve cac, va cam
lo va » lao va, ly va, le 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) OR (te sach)) tu nang xa hoi. hieu ve cam ((lo va) or (lo van)) hang va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) tu nang xa hoi. hieu ve cam ((lo va) OR (lo van)) hang va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) tu nang xa hoi. hieu ve cam ((lo va) or (lo van)) hang va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) tu nang xa hoi. hieu ve cam ((lo va) or (lo van)) hang va cua tre*.