Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lai » hanh lam, hanh tai, thanh lap
chat soc » cham soc, chat hoc, chat doc
thu sach » tu sach, thuat sach, thuoc sach
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
va hanh » van hanh, va thanh, va danh
soc va » hoc va, loc va, doc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (((tu cach) or (tu cac)))) ty nang ma hoi. hieu va chat soc va hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (((tu cach) OR (tu cac)))) ty nang ma hoi. hieu va chat soc va hanh lai chau triet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((tu cach) or (tu cac)))) ty nang ma hoi. hieu va chat soc va hanh lai chau triet*.