Perhaps you should try some spelling variations:
phuong sanh » phuong anh, phuong danh, phuong hanh
thanh trung » thanh tung
thieu sach » chieu sach, thien hach, hieu cach
cac phuong » cac truong
hoc thieu » toc thieu, hoc hien
trung cac » truong cac, trung cap, trong cac
chinh cau » chinh chau, chinh can, chinh tai
sanh dan » canh dan, sach danh, sinh danh
chan cau » phan cau, can cau, nhanh cau
chinh ca » chinh ta, chinh va, chinh tai

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 - thanh trung cac phuong sanh dan ((chan cau) or (((chinh cau) OR (chinh ca))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh trung cac phuong sanh dan ((chan cau) OR (((chinh cau) OR (chinh ca)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh trung cac phuong sanh dan ((chan cau) or (((chinh cau) OR (chinh ca))))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh trung cac phuong sanh dan ((chan cau) or (((chinh cau) OR (chinh ca))))*.