Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
thu phuong » thi phuong, thu huong, theo phuong
nhung cong » dung cong, thong cong, nhung don
hien sach » dien sach, kien sach, thien hach
hang cong » dang cong, hang nong, bang cong
dan toan » van toan, dan than, manh toan
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 hien sach - hanh trinh quan ((thu phuong) or (((nhung cong) OR (hang cong)))) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - hanh trinh quan ((thu phuong) OR (((nhung cong) OR (hang cong)))) dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien sach - hanh trinh quan ((thu phuong) or (((nhung cong) OR (hang cong)))) dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - hanh trinh quan ((thu phuong) or (((nhung cong) OR (hang cong)))) dan toan ban*.