Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
thi chieu » thi chien, thi hieu, theo chieu
hanh dung » anh dung, hanh dong, manh dung
luan dang » luan nang, luan danh, luan dong
dang long » dang cong, nang luong, thang long
long tinh » cong tinh, trong tinh, luong tin
theo chu » theo chieu, cho chu, chao chu
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: ((thi chieu) or (theo chu)) sach - ((hanh dung) OR (thanh dung)) luan dang long tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (theo chu)) sach - ((hanh dung) OR (thanh dung)) luan dang long tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thi chieu) or (theo chu)) sach - ((hanh dung) OR (thanh dung)) luan dang long tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (theo chu)) sach - ((hanh dung) OR (thanh dung)) luan dang long tinh toan cau*.