Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
hoc nhiet » hoc nghien, hoc hien, hoc viet
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh manh » hanh mang, lanh manh, hoang manh
cua trong » cua truong, cua trung, qua trong
tap tranh » tap thanh, lap trinh, tap toan
manh cua » doanh cua, ban cua
cong tap » cuong tap, cong tac, cong tan

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 thiet)) tach - hanh manh cua trong cong tap tranh luan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc nhiet) OR (hoc thiet)) tach - hanh manh cua trong cong tap tranh luan.
• Adding a wildcard symbol may retrieve word variants: ((hoc nhiet) or (hoc thiet)) tach - hanh manh cua trong cong tap tranh luan*.