Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
cua tre » cua te, cuu tre, dua tren
hieu va » lieu va, hieu qua
loc va » hoc va, luc va
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
soc va » hoc va, doc va, goc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang ha hoi. hieu va thanh ((soc va) OR (loc va)) hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang ha hoi. hieu va thanh ((soc va) OR (loc va)) hanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang ha hoi. hieu va thanh ((soc va) OR (loc va)) hanh vi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ha hoi. hieu va thanh ((soc va) OR (loc va)) hanh vi ((cua tre) or (cua triet))*.