Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, truong thanh
nhung lang » nhung van, nhanh lang, nhung cong
tran tuan » tran xuan, tran quang, tran thanh
lang tinh » dang tinh, long tinh, bang tinh
toan cau » toan cao, toan ban, toan tap

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 nganh) or (chieu sach)) - thanh ((trung tuan) OR (tran tuan)) nhung lang tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (chieu sach)) - thanh ((trung tuan) OR (tran tuan)) nhung lang tinh toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu nganh) or (chieu sach)) - thanh ((trung tuan) OR (tran tuan)) nhung lang tinh toan cau*".