Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
trinh nhan » trinh han, trinh phan, trinh nha
hoc thieu » toc thieu, hoc hien
nhan dang » nhan dan, phan dang, tran dang
dung manh » duong manh, dung danh, tung manh
hung manh » nhung manh, hung anh, tung manh
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 thieu sach - hanh trinh nhan dang ((dung manh) or (hung manh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trinh nhan dang ((dung manh) OR (hung manh)) toan ban*.