Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thanh di » thanh doi, thanh de, thanh do
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
soc va » hoc va, loc va, doc 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 ty ((nang xa) OR (nang ma)) hoi. hieu ve cham soc va ((thanh di) or (thanh pho)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang ma)) hoi. hieu ve cham soc va ((thanh di) OR (thanh pho)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) OR (nang ma)) hoi. hieu ve cham soc va ((thanh di) or (thanh pho)) cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) OR (nang ma)) hoi. hieu ve cham soc va ((thanh di) or (thanh pho)) cua viet*.