Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hoc thieu » toc thieu, hoc hien
anh tang » anh bang, anh dang, anh nang
van dung » van dong, tin dung
cong anh » cong danh, dong anh, hong anh
anh tan » anh tuan, anh toan, anh ta
tan tai » toan tai, tang tai, tuan tai

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 - anh tang ((van dung) or (xay dung)) cong anh tan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo chieu)) sach - anh tang ((van dung) OR (xay dung)) cong anh tan tai.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo chieu)) sach - anh tang ((van dung) or (xay dung)) cong anh tan tai*.