Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
cong thong » cong thuong, cong trong, dong thong
hoc thieu » toc thieu, hoc hien
thong den » thong dien, thong dan, tuong den
van hanh » van thanh, ban hanh, van anh
hanh cua » manh cua, hang cua, hanh sua
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (theo chieu)) sach - van hanh cua cong thong den ((phan cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo chieu)) sach - van hanh cua cong thong den ((phan cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo chieu)) sach - van hanh cua cong thong den ((phan cau) or (phan cac))*.