Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, thien dang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
cang thang » cong thanh, dang thanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh han » trinh quan
han nhung » hanh nhung, hon nhung, ban nhung
vang than » sang than, van than, dang thanh

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 danh - hanh trinh han nhung cong ((vang than) or (cang thang)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet danh - hanh trinh han nhung cong ((vang than) OR (cang thang)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - hanh trinh han nhung cong ((vang than) or (cang thang)) cau*.