Perhaps you should try some spelling variations:
van cham » van chat, va cham, van pham
van tham » van thanh, van tuan, van chat
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
luc hoi » luc khoi, luc hoc, lu hoi
soc va » loc va, doc va, goc 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 luc hoi. thien ((van cham) or (van tham)) ((soc va) or (hoc va)) hanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang luc hoi. thien ((van cham) OR (van tham)) ((soc va) OR (hoc va)) hanh lai su triet.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang luc hoi. thien ((van cham) or (van tham)) ((soc va) or (hoc va)) hanh lai su triet*.