Perhaps you should try some spelling variations:
hoc nghien » hoc hien
hoc nhiet » hoc thiet, hoc hien, hoc viet
hanh mang » nhanh mang, hanh trang, nhanh lang
cua thong » cua thuong, cua khong, cua tong
mang cua » manh cua, dung cua, ban cua
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc nhiet) OR (hoc nghien)) tach - hanh mang cua thong ((cong dan) or (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc nhiet) OR (hoc nghien)) tach - hanh mang cua thong ((cong dan) OR (cong tac)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc nhiet) OR (hoc nghien)) tach - hanh mang cua thong ((cong dan) or (cong tac)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc nhiet) OR (hoc nghien)) tach - hanh mang cua thong ((cong dan) or (cong tac)) toan ban*.