Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thuyet, hoc hien, toc thieu
hoc thieu » toc thieu, hoc hien
thanh cad » thanh ca, thanh cac, thanh cham
ve nhung » va nhung, tu nhung
cong ban » cong bang, cong san, cong tan
hanh cad » hanh cac, hanh cat, hanh cap
tung ve » dung ve, tung le, tung va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc thieu)) tach - thanh tung ve nhung cong ban ((thanh cad) OR (hanh cad))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) OR (hoc thieu)) tach - thanh tung ve nhung cong ban ((thanh cad) or (hanh cad))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) OR (hoc thieu)) tach - thanh tung ve nhung cong ban ((thanh cad) or (hanh cad))*.