Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tuong dan » huong dan, tung dan, xuong dan
dan nhung » ban nhung, dap nhung, san nhung
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai
so thiet » soc thiet, hoa thiet, tao thiet
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (so thiet)) tach - thanh tuong dan nhung cong dan thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (so thiet)) tach - thanh tuong dan nhung cong dan thanh lap*.