Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
trinh hu » trinh chu, trinh tu, trinh he
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
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) OR (thu sach)) y nang 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) OR (thu sach)) y nang 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) OR (thu sach)) y nang xa hoi. hieu ((va nam) or (va cay)) tu lap trinh hu cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang xa hoi. hieu ((va nam) or (va cay)) tu lap trinh hu cua triet*.