Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh ban » doanh bat, doanh van, doanh nhan
ve triet » va trien, su triet
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cac te » cac he, cac tu, cac ke
te va » tu 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 y ((nang xa) OR (nang ma)) hoi. lieu va cac te va doanh ban ((cua triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang ma)) hoi. lieu va cac te va doanh ban ((cua triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) OR (nang ma)) hoi. lieu va cac te va doanh ban ((cua triet) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) OR (nang ma)) hoi. lieu va cac te va doanh ban ((cua triet) or (ve triet))*.