Perhaps you should try some spelling variations:
nhiet tach » chiet tach
hanh trinh » canh tranh, hanh chinh
tong cuong » tong cong, hong cuong, thong chuong
tang cuong » nang luong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
tap quan » tac quan, hai quan

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 tach - hanh trinh cua ((tong cuong) OR (tang cuong)) ((tap doan) or (tap quan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - hanh trinh cua ((tong cuong) OR (tang cuong)) ((tap doan) OR (tap quan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nhiet tach - hanh trinh cua ((tong cuong) OR (tang cuong)) ((tap doan) or (tap quan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - hanh trinh cua ((tong cuong) OR (tang cuong)) ((tap doan) or (tap quan)) ban*.