Perhaps you should try some spelling variations:
nhung luong » hung luong, nhung huong, nhung tuong
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
luong thi » luong tai
trinh va » trinh van, trinh vat, trinh ve
trang va » tran van, hang va
thi toan » thi tran, thi hoan, thi loan
toan tap » toan ban

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 (chieu sach)) - canh ((trinh va) or (trang va)) nhung luong thi toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - canh ((trinh va) OR (trang va)) nhung luong thi toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - canh ((trinh va) or (trang va)) nhung luong thi toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - canh ((trinh va) or (trang va)) nhung luong thi toan tap*.