Perhaps you should try some spelling variations:
duoc tieng » doc tieng, quoc tieng, hoc tieng
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
dong huong » dong thuong, dong duong, cong huong
luan dong » luan cong, quan dong, luan nong
toan tai » toan tap, doanh tai, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: duoc tieng anh - hanh trinh luan dong huong dan ((toan tai) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: duoc tieng anh - hanh trinh luan dong huong dan ((toan tai) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: duoc tieng anh - hanh trinh luan dong huong dan ((toan tai) or (van ban))*.