Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
bat thanh » ban thanh, bac thanh, dat thanh
cua triet » cua viet, su triet, va triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cam » van nam, van cau, van dam
van lam » van nam
luc bat » suc bat, luc nhat, luat bat
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang x hoi. hieu ((van cam) or (van lam)) luc bat thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. hieu ((van cam) OR (van lam)) luc bat thanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. hieu ((van cam) or (van lam)) luc bat thanh dai cua triet*.