Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cong sang » cong lang, cong vang, cong bang
toc dieu » hoc dieu, soc dieu, thuoc dieu
trinh ve » trinh he, trinh va, trinh vi
ve thong » he thong, va thong, ve phong
cong san » cong tac
song van » hoang van, trong van, duong van
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc dieu hanh - hanh trinh ve thong ((((cong san) or (cong sang))) or (song van)) than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc dieu hanh - hanh trinh ve thong ((((cong san) OR (cong sang))) OR (song van)) than tap.
• Adding a wildcard symbol may retrieve word variants: toc dieu hanh - hanh trinh ve thong ((((cong san) or (cong sang))) or (song van)) than tap*.