Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lap » thanh san, thanh hai, thanh van
phan lap » phan dau
hanh lai » hanh lam, hanh tai, thanh loi
hieu van » hieu va, thien van, lieu va
van hac » van hoc, van ha, van hai
hac duc » hoc duc, ha duc, thach duc
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, su sach, vu khach
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: vu sach y nang xa hoi. hieu van hac duc va ((((hanh lai) OR (thanh lap))) or (phan lap)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. hieu van hac duc va ((((hanh lai) OR (thanh lap))) OR (phan lap)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. hieu van hac duc va ((((hanh lai) OR (thanh lap))) or (phan lap)) cua triet".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang xa hoi. hieu van hac duc va ((((hanh lai) OR (thanh lap))) or (phan lap)) cua triet*.