Perhaps you should try some spelling variations:
chiet tach » chieu sach
thuat tach » thuat sach, thuat mach, thuat tac
canh manh » lanh manh, canh tranh, cach mang
dung cong » dung trong
dang hanh » dang thanh, ban hanh, dang van
hanh chau » thanh chau, canh chau, hanh cham
manh cua » doanh cua, ban cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (thuat tach)) - canh manh cua ((dung cong) or (thong thong)) dang hanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (thuat tach)) - canh manh cua ((dung cong) OR (thong thong)) dang hanh chau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (thuat tach)) - canh manh cua ((dung cong) or (thong thong)) dang hanh chau*.