Perhaps you should try some spelling variations:
dau treo » dau tren, cau treo, dau theo
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
hanh va » hang va, hanh vi
cam luc » cau luc
va hanh » van hanh, va thanh, va danh
va dau » va dao
tu sac » tu sach, tu cac, tu san

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 lang) OR (ky dang)) xa hoi. hieu va ((cam luc) or (cam xuc)) va hanh va dau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky dang)) xa hoi. hieu va ((cam luc) OR (cam xuc)) va hanh va dau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky lang) OR (ky dang)) xa hoi. hieu va ((cam luc) or (cam xuc)) va hanh va dau treo".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) OR (ky dang)) xa hoi. hieu va ((cam luc) or (cam xuc)) va hanh va dau treo*.