Perhaps you should try some spelling variations:
phuong thanh » phong thanh, truong thanh, phuong thao
phuong hanh » phuong anh, phuong danh, phuong hoang
hanh trung » thanh trung, hanh trang, manh trung
trung tuan » trung thanh, trung tam, tran tuan
tuan nhung » quan nhung, tuan hung, thuat nhung
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 trung tuan nhung ((phuong hanh) OR (phuong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - hanh trung tuan nhung ((phuong hanh) OR (phuong thanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - hanh trung tuan nhung ((phuong hanh) OR (phuong thanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - hanh trung tuan nhung ((phuong hanh) OR (phuong thanh)) toan cau*.