Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve chao » ve chat, ve cham, ve chang
va hanh » van hanh, va thanh, va danh
ve cho » ve co, ve che, de cho
hang » dang, bang

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 xa hoi. hieu ((ve chao) OR (ve cho)) xu ((va hanh) or (ngan hang)) va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((ve chao) OR (ve cho)) xu ((va hanh) OR (ngan hang)) va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((ve chao) OR (ve cho)) xu ((va hanh) or (ngan hang)) va su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((ve chao) OR (ve cho)) xu ((va hanh) or (ngan hang)) va su triet*.