Perhaps you should try some spelling variations:
xa thanh » va thanh, ta thanh, gia thanh
ha thanh » va thanh, phan thanh, thi thanh
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
ve cac » va cac, vien cac
o hoi » co hoi, o hoc, o hai
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang o hoi. hieu ve cac tuc ((xa thanh) or (((ha thanh) or (pham thanh)))) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang o hoi. hieu ve cac tuc ((xa thanh) OR (((ha thanh) OR (pham thanh)))) ki su triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang o hoi. hieu ve cac tuc ((xa thanh) or (((ha thanh) or (pham thanh)))) ki su triet*.