Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc tien
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thien) OR (hoc thiet)) hach - hanh trinh cua nhung cong san toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thien) OR (hoc thiet)) hach - hanh trinh cua nhung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thien) OR (hoc thiet)) hach - hanh trinh cua nhung cong san toan cao*.