Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dong thanh » truong thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
nang dong » nang song, lang dong, nang luong
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
san tap » han tap, man tap, san tay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chieu sach)) - thanh ((trung va) OR (trang va)) nang dong thanh san tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sach)) - thanh ((trung va) OR (trang va)) nang dong thanh san tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - thanh ((trung va) OR (trang va)) nang dong thanh san tap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - thanh ((trung va) OR (trang va)) nang dong thanh san tap*.