Perhaps you should try some spelling variations:
thiet tinh » thien tinh, thuyet tinh, chieu tinh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
dan phan » doan phan, dan chan, dam phan
van phan » van phong, van thanh, luan phan

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 tinh - hanh trinh cua thong cong ((dan phan) or (van phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tinh - hanh trinh cua thong cong ((dan phan) OR (van phan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tinh - hanh trinh cua thong cong ((dan phan) or (van phan)) cau*.