Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sang tai » hang tai, sang tao, tang tai
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
ky sang » ky nang, ky dang, ky tang
ve cham » va cham, ve chat, vu cham
ve cam » ve cac, va cam, ve cai
tai ha » thai ha, tai hai, tai nha
vi cua » vai cua, di cua

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 sang tai ha. hieu ((ve cam) OR (ve cham)) xuc ((van hanh) or (va thanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang tai ha. hieu ((ve cam) OR (ve cham)) xuc ((van hanh) OR (va thanh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang tai ha. hieu ((ve cam) OR (ve cham)) xuc ((van hanh) or (va thanh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang tai ha. hieu ((ve cam) OR (ve cham)) xuc ((van hanh) or (va thanh)) vi cua triet*.