Perhaps you should try some spelling variations:
hoc nghien » hoc hien
hanh trang » thanh trung, canh tranh, hanh trinh
hoc nhiet » hoc thiet, hoc hien, hoc viet
trang cua » tranh cua, tang cua, trung cua
cua thong » cua thuong, cua khong, cua tong
cong tan » cong tac, cong san, cong thanh
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 trang cua thong ((cong dong) or (cong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc nhiet) OR (hoc nghien)) tach - hanh trang cua thong ((cong dong) OR (cong tan)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc nhiet) OR (hoc nghien)) tach - hanh trang cua thong ((cong dong) or (cong tan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc nhiet) OR (hoc nghien)) tach - hanh trang cua thong ((cong dong) or (cong tan)) toan ban*.