Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nha nang » nham nang, kha nang, nha hang
kham luc » khai luoc, kham cuoc, nhan luc
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
va dauh » va danh, va doanh
tu sach » thu sach, su sach, tu cach
va dau » va dao
vi cua » vai cua, di cua

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)) nha nang xa hoi. hieu vu kham luc ((va dauh) or (va dau)) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) nha nang xa hoi. hieu vu kham luc ((va dauh) OR (va dau)) vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) nha nang xa hoi. hieu vu kham luc ((va dauh) or (va dau)) vi cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) nha nang xa hoi. hieu vu kham luc ((va dauh) or (va dau)) vi cua viet*.