Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
cua triet » cua viet, su triet, va triet
thanh ve » hanh ve, thanh va, thanh van
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa

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 ky nang x ho. hieu va cac ((tuc va) or (duc va)) ((thanh ve) OR (thanh vien)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x ho. hieu va cac ((tuc va) OR (duc va)) ((thanh ve) OR (thanh vien)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x ho. hieu va cac ((tuc va) or (duc va)) ((thanh ve) OR (thanh vien)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. hieu va cac ((tuc va) or (duc va)) ((thanh ve) OR (thanh vien)) cua triet*.