Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thieu sach » chieu sach, hieu cach, thieu cac
hanh trung » thanh trung, hanh trang, manh trung
nhung dong » nhung don, nhung cong, nhung dung
dong thanh » truong thanh
thanh khan » thanh phan, thanh nhan, thanh thanh
theo sach » thuoc sach, te sach, theo lich
trung dap » trung cap, trung dai, trung dam
dap nhung » vap nhung, va nhung, dap ung
khan cap » khan ap, than cap, khoan cam

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 sach) OR (theo sach))) or (thien hach)) - hanh trung dap nhung dong thanh khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu sach) OR (theo sach))) OR (thien hach)) - hanh trung dap nhung dong thanh khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((thieu sach) OR (theo sach))) or (thien hach)) - hanh trung dap nhung dong thanh khan cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu sach) OR (theo sach))) or (thien hach)) - hanh trung dap nhung dong thanh khan cap*.