Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
tranh nhan » thanh nhan, tran nhan, trinh nhan
nhan trong » nhuan trong, nhat trong, nhin trong
hoc thieu » toc thieu, hoc hien
tran chau » tranh chap, tran huu
cong san » cong tac
tran cau » toan cau, ran cau, trang mau
tra cau » tra sau, ta cau, tra cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu tach - canh tranh nhan trong cong san ((((tran cau) or (tra cau))) or (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - canh tranh nhan trong cong san ((((tran cau) OR (tra cau))) OR (tran chau)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - canh tranh nhan trong cong san ((((tran cau) or (tra cau))) or (tran chau))*.