Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cua triet » cua viet, su triet, va triet
va doanh » van doanh, vay doanh, va danh
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach kem
cao tuc » dao tuc, cao duc, cao suc
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sach ty)) lang xa hoi. hieu va cao tuc va doanh van ((cua triet) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) lang xa hoi. hieu va cao tuc va doanh van ((cua triet) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) lang xa hoi. hieu va cao tuc va doanh van ((cua triet) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach ty)) lang xa hoi. hieu va cao tuc va doanh van ((cua triet) or (cua tu))*.