Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
thien va » thien van, tien va, thien tai
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
va hanh » van hanh, va danh, ban hanh

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 cau hoi. thien va cham soc ((va hanh) or (va thanh)) lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cau hoi. thien va cham soc ((va hanh) OR (va thanh)) lai su triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cau hoi. thien va cham soc ((va hanh) or (va thanh)) lai su triet*.