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
cua viet » ca viet, hoa viet, cua vat
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
lai cua » dai cua, hai cua, lai chau
soc va » hoc va, loc va, doc va

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 cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang cau hoi. thien ((van cham) OR (van chat)) soc va hanh lai cua 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 cua viet*.