Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
hanh nang » anh nang, ganh nang, hanh mang
cong tang » cong thang, cong lang, cong vang
thanh cao » thanh ca, thanh cac, thanh thao
cao dung » cao dang, cao dong, cao ung
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (hoc thieu)) sach - hanh nang cao dung ((cong tan) or (cong tang)) thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) sach - hanh nang cao dung ((cong tan) OR (cong tang)) thanh cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) sach - hanh nang cao dung ((cong tan) or (cong tang)) thanh cao*.