Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang tai » hang tai, tang tai, sang tai
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va danh, ban hanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
tai hoi » tai khoi, dai hoi, tai hai
ve cham » va cham, ve chat, vu cham
ve cai » va cai, ve cac, ve tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang tai hoi. hieu ((ve cai) or (ve cham)) duc ((va hanh) OR (va thanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang tai hoi. hieu ((ve cai) OR (ve cham)) duc ((va hanh) OR (va thanh)) vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang tai hoi. hieu ((ve cai) or (ve cham)) duc ((va hanh) OR (va thanh)) vai cua triet*".