Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lai » hanh lam, hanh tai, thanh lap
phan lap » phan dau
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van hac » van ha, van hai, van chat
van hoc » van hoa
y nang » ky nang, ly nang, v nang

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 hoi. hieu ((van hac) OR (van hoc)) duc va ((hanh lai) or (phan lap)) chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((van hac) OR (van hoc)) duc va ((hanh lai) OR (phan lap)) chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ((van hac) OR (van hoc)) duc va ((hanh lai) or (phan lap)) chau triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((van hac) OR (van hoc)) duc va ((hanh lai) or (phan lap)) chau triet*.