Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lam » thanh lap, hanh lam, thanh nam
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
lam cua » nam cua, lam chat
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
hau duc » huu duc, ha duc, phan duc
ho duc » hoc duc, do duc, hong duc
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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