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