Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh hang » thanh hang, hang hang, hanh han
nang cong » nang song, dang cong, bang cong
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong thanh
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - hanh hang va nang cong tan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh hang va nang cong tan ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh hang va nang cong tan ((toan tai) or (toan cao))*.