Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu vi » hieu voi, hieu va, hieu ve
cach tu » cach thuc
duy may » dung may, duy thay
duy mai » duy ai, duy thai
tinh di » tinh doi, trinh di, tinh da
di cua » dai cua, doi cua, de 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 ((cach tu) or (sach ty)) nang xa hoi. hieu vi pham ((duy may) or (duy mai)) tinh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cach tu) OR (sach ty)) nang xa hoi. hieu vi pham ((duy may) OR (duy mai)) tinh di cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((cach tu) or (sach ty)) nang xa hoi. hieu vi pham ((duy may) or (duy mai)) tinh di cua viet*.