Perhaps you should try some spelling variations:
thanh sinh » thanh binh, thanh tinh, thanh vinh
tang thanh » dang thanh, trung thanh, hoang thanh
sinh cau » trinh cau, sinh vat, sinh va
duc tang » duc thang, duc tan, tuc tang
cau treo » cau theo, cau tren, cau triet
xay hoi » xa hoi, tay hoi, cay phoi
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
hoc cac » hoc cao
2 dang » 2 danh, _ dang, b dang
y dang » ky dang, _ dang, b dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc cac ((y dang) OR (2 dang)) xay hoi. thien ((van cac) or (van cau)) duc tang thanh sinh cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc cac ((y dang) OR (2 dang)) xay hoi. thien ((van cac) OR (van cau)) duc tang thanh sinh cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc cac ((y dang) OR (2 dang)) xay hoi. thien ((van cac) or (van cau)) duc tang thanh sinh cau treo".
• Adding a wildcard symbol may retrieve word variants: hoc cac ((y dang) OR (2 dang)) xay hoi. thien ((van cac) or (van cau)) duc tang thanh sinh cau treo*.