Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, le thanh
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va tinh » may tinh
sinh va » sinh vat, tinh va, dinh van
nang o » nang co, nang ho, nang ro
va nam » van nam, ha nam, va nay
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 nam cua ((va thanh) or (va tinh)) sinh va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang o hoi. hieu va nam cua ((va thanh) OR (va tinh)) sinh va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hoi. hieu va nam cua ((va thanh) or (va tinh)) sinh va triet*.