Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trung » thanh trung, hanh trang, manh trung
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong san » cong tac
than ban » thanh ban, toan ban, than man

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 sach - hanh trung cua thong ((huong dan) or (cong san)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trung cua thong ((huong dan) OR (cong san)) than ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trung cua thong ((huong dan) or (cong san)) than ban*.