Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
phong cong » phong chong, thong cong, chong cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh van » tran van, trinh van, thanh van
van phong » van dong, hai phong
cong dan » cong san, cong tan, huong dan
nhan tai » hang tai, van tai, toan tai
chan ta » chan tha, nhan tao, 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: hoc thiet tach - canh tranh van phong cong dan ((chan ta) OR (nhan tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - canh tranh van phong cong dan ((chan ta) OR (nhan tai))".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - canh tranh van phong cong dan ((chan ta) OR (nhan tai))*.