Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
van cham » van tham, va cham, van pham
van chat » cao chat
nang dau » hang dau, xang dau, nang du
dau hoi » cau hoi, dai hoi, dan hoi
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
lai cua » dai cua, hai cua, lai chau
so sach » so sanh, bo sach, co sach
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc 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 dau hoi. thien ((van cham) or (van chat)) ((soc va) OR (doc va)) hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang dau hoi. thien ((van cham) OR (van chat)) ((soc va) OR (doc va)) hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang dau hoi. thien ((van cham) or (van chat)) ((soc va) OR (doc va)) hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang dau hoi. thien ((van cham) or (van chat)) ((soc va) OR (doc va)) hanh lai cua triet*.