Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
thanh ve » hanh ve, thanh va, thanh vien
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
ve cua » le cua, de cua, te cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (tu sach)) ky nang x hoi. hieu va tham ((luc van) OR (duc van)) thanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang x hoi. hieu va tham ((luc van) OR (duc van)) thanh ve cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) ky nang x hoi. hieu va tham ((luc van) OR (duc van)) thanh ve cua triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang x hoi. hieu va tham ((luc van) OR (duc van)) thanh ve cua triet*.