Perhaps you should try some spelling variations:
trang thuat » trong thuat, trang thuc, trang thiet
theo chieu » theo tieu, theo chu, thi chieu
hanh trang » thanh trung, canh tranh, hanh trinh
nang cong » nang song, bang cong, hang cong
dang cong » dung cong
ho chieu » hoc thieu, doi chieu, mot chieu
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

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 (theo chieu)) sach - hanh trang thuat ((nang cong) OR (dang cong)) dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - hanh trang thuat ((nang cong) OR (dang cong)) dan phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) sach - hanh trang thuat ((nang cong) OR (dang cong)) dan phan dau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) sach - hanh trang thuat ((nang cong) OR (dang cong)) dan phan dau*.