Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
hanh tran » hanh trang, thanh tran, hanh tram
van phung » van hung, van chuong, van dung
van phong » van dong, hai phong
thanh cao » thanh ca, thanh thao, thanh cham
thanh cac » hanh cac, thanh bac, thanh ca
cong tai » cong thai, cong tac, dong tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh tran ((van phung) OR (van phong)) cong tai ((thanh cao) OR (thanh cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh tran ((van phung) or (van phong)) cong tai ((thanh cao) OR (thanh cac))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh tran ((van phung) or (van phong)) cong tai ((thanh cao) OR (thanh cac))*.