Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu vien » hieu hien, hieu viec, thieu nien
thanh te » thanh ve, thanh de, thanh le
xa thanh » va thanh, ha thanh, ta thanh
va triet » va thiet, va trien, ve triet
sach ty » sach y, sach tu, sach thu
cac dac » cac dan, cac dai, cac bac
ty nang » ky nang, ty xang, ty hang
cac tac » cac toc, cac bac, cac tai
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
te va » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty nang o hoi. hieu vien ((cac tac) or (cac dac)) xa thanh te va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang o hoi. hieu vien ((cac tac) OR (cac dac)) xa thanh te va triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang o hoi. hieu vien ((cac tac) or (cac dac)) xa thanh te va triet*.