Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
so thiet » soc thiet, hoc thiet, hoa thiet
trinh va » trinh van, trinh vat, trinh ve
cong van » cong vang, cong san, song van
va dung » van dung, va duong, vat dung
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (so thiet)) tach - hanh trinh va dung cong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (so thiet)) tach - hanh trinh va dung cong van van ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (so thiet)) tach - hanh trinh va dung cong van van ban*.