Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
cong thanh » dong thanh, cong trinh, truong thanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong ty
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 tach - hanh tang cua nhung ((cong thanh) OR (cong tan)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - hanh tang cua nhung ((cong thanh) OR (cong tan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - hanh tang cua nhung ((cong thanh) OR (cong tan)) toan ban*.