Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, nhung don
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
thanh cac » hanh cac, thanh bac, tranh cac
thanh ca » thanh cha, thanh ha, thanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu manh - hanh trinh cua ((nhung cong) or (hang cong)) dan ((thanh ca) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu manh - hanh trinh cua ((nhung cong) OR (hang cong)) dan ((thanh ca) OR (thanh cac)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - hanh trinh cua ((nhung cong) or (hang cong)) dan ((thanh ca) or (thanh cac))*.