Perhaps you should try some spelling variations:
thieu sach » hieu cach, theo sach, thieu cac
thien hach » thien thanh, hien hanh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
trong ban » trong san, trong tan, trong quan
cua dung » cua dang, cua dong, qua dung
ban hang » ngan hang
hang van » hoang van, hang va, dang van

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) or (thien hach))) or (chieu sach)) - hanh trinh cua dung trong ban hang van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu sach) OR (thien hach))) OR (chieu sach)) - hanh trinh cua dung trong ban hang van.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu sach) or (thien hach))) or (chieu sach)) - hanh trinh cua dung trong ban hang van*.