Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
sang cua » mang cua, hang cua, tang cua
cham sat » cham mat, khao sat, giam sat
song cua » cong cua, dong cua, huong cua
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu vu » hieu va, hieu ve, hieu su
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 vu ((cham sat) OR (cham soc)) van thanh ((sang cua) or (song cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xa hoi. hieu vu ((cham sat) OR (cham soc)) van thanh ((sang cua) OR (song cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang xa hoi. hieu vu ((cham sat) OR (cham soc)) van thanh ((sang cua) or (song cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. hieu vu ((cham sat) OR (cham soc)) van thanh ((sang cua) or (song cua)) tre*.