Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung thanh » truong thanh
thanh nhung » thanh hung, hanh nhung, tranh nhung
nhung thong » chung thong, nhung chong, nhung phong
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
thong van » trong van, thong va, thong quan
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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)) - thanh trung thanh nhung thong van ((than cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - thanh trung thanh nhung thong van ((than cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (chieu sach)) - thanh trung thanh nhung thong van ((than cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (chieu sach)) - thanh trung thanh nhung thong van ((than cau) OR (phan cau))*.