Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
hanh trinh » canh tranh, hanh chinh
duong cong » luong cong, duong trong, trong cong
theo tiem » theo tieu, them niem, thep tieu
tiem hanh » tien hanh, tim hanh, tien thanh
dung cong » dung trong
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tiem hanh - hanh trinh chuan ((duong cong) OR (dung cong)) tan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tiem hanh - hanh trinh chuan ((duong cong) OR (dung cong)) tan than cau".
• Adding a wildcard symbol may retrieve word variants: theo tiem hanh - hanh trinh chuan ((duong cong) OR (dung cong)) tan than cau*.