Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
van cham » van tham, va cham, van pham
van chat » cao chat
hanh lai » hanh lam, hanh tai, thanh lap
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
soc va » hoc va, loc va, doc va
lai ca » lai cua, lai cam, loai ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang cau hoi. thien ((van cham) or (van chat)) soc va hanh lai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang cau hoi. thien ((van cham) OR (van chat)) soc va hanh lai ca viet.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang cau hoi. thien ((van cham) or (van chat)) soc va hanh lai ca viet*.