Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
trinh hu » trinh chu, trinh tu, trinh he
tu sach » thu sach, su sach, te sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
va nam » van nam, ha nam, va nay
va cay » va cac, va cao, va cai
tu lap » truc lap
hu cua » tu cua, vu 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 y ((nang xa) OR (lang xa)) hoi. hieu ((va nam) or (va cay)) tu lap trinh hu cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang xa)) hoi. hieu ((va nam) OR (va cay)) tu lap trinh hu cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) OR (lang xa)) hoi. hieu ((va nam) or (va cay)) tu lap trinh hu cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) OR (lang xa)) hoi. hieu ((va nam) or (va cay)) tu lap trinh hu cua triet*.