Perhaps you should try some spelling variations:
tham soc » tham nuoc, thai son, ham so
dinh cuu » dinh chi
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
vi cuu » vi luu, vinh cuu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang xa hoi. hieu va ((tham soc) OR (cham soc)) va hanh ((vi cuu) OR (dinh cuu)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang xa hoi. hieu va ((tham soc) OR (cham soc)) va hanh ((vi cuu) or (dinh cuu)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky dang xa hoi. hieu va ((tham soc) OR (cham soc)) va hanh ((vi cuu) or (dinh cuu)) tre*.