Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
luan hoang » luan hoan, quan hoang, tuan hoang
phuong van » phung van, phong van, phuong va
phuong lan » phuong la, thuong lan, phuong linh
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) sach - hanh trinh luan hoang ((phuong van) OR (phuong lan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - hanh trinh luan hoang ((phuong van) OR (phuong lan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - hanh trinh luan hoang ((phuong van) OR (phuong lan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - hanh trinh luan hoang ((phuong van) OR (phuong lan)) toan cau*.