Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh ngan » chinh ngan, trinh han, trinh quan
hoc thieu » hoc hien
ngan dang » ngan hang, nhan dang, ngan danh
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) OR (toc thieu)) sach - hanh trinh ngan dang ((dung manh) or (hung manh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sach - hanh trinh ngan dang ((dung manh) OR (hung manh)) toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (toc thieu)) sach - hanh trinh ngan dang ((dung manh) or (hung manh)) toan ban*".