Perhaps you should try some spelling variations:
nhiet tach » chiet tach
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
thanh ban » thanh san, thanh van, thanh bac
cong san » cong tac
than ban » toan ban, than man, nhuan ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nhiet tach - hanh trinh cua thong cong san ((than ban) OR (thanh ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - hanh trinh cua thong cong san ((than ban) OR (thanh ban))*.