Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trang cua » tranh cua, tang cua, trung cua
so thiet » soc thiet, hoa thiet, tao thiet
tan toan » tan tran, tap toan, van toan
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 thiet) or (so thiet)) tach - hanh trang cua ((nhung cong) OR (thong cong)) tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (so thiet)) tach - hanh trang cua ((nhung cong) OR (thong cong)) tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (so thiet)) tach - hanh trang cua ((nhung cong) OR (thong cong)) tan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (so thiet)) tach - hanh trang cua ((nhung cong) OR (thong cong)) tan toan ban*.