Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
sang cua » song cua, hang cua, tang cua
mang cua » manh cua, dung cua, ban cua
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
sat van » sat va, hat van, hoat van
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
khao » khac, khai, thao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang xa hoi. hieu va khao sat van thanh ((sang cua) OR (mang cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang xa hoi. hieu va khao sat van thanh ((sang cua) OR (mang cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. hieu va khao sat van thanh ((sang cua) OR (mang cua)) tre*.