Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trinh » canh tranh, hanh chinh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, toan ban, von tai
toan cao » toan ban, toan 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 - hanh trinh vat dung cong dan ((((toan tai) or (doanh tai))) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - hanh trinh vat dung cong dan ((((toan tai) OR (doanh tai))) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - hanh trinh vat dung cong dan ((((toan tai) or (doanh tai))) or (toan cao))*.