Perhaps you should try some spelling variations:
ky nganh » ky nang, k ngan, da nganh
anh thai » anh thi, anh tai, nhanh thai
cua tre » cua te, cuu tre, cua triet
cao duc » dao duc, cao suc, giao duc
anh hai » lanh hai, manh hai, anh bai
duc ban » duc tan, duc van, dua ban
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ly ngan » ly nhan
ve cao » va cao, ve bao, ve cac
te sac » te sach, te cac, te san

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 nganh) OR (ly ngan)) xay hoi. hieu ve cao duc ban ((anh hai) or (anh thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky nganh) OR (ly ngan)) xay hoi. hieu ve cao duc ban ((anh hai) OR (anh thai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky nganh) OR (ly ngan)) xay hoi. hieu ve cao duc ban ((anh hai) or (anh thai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky nganh) OR (ly ngan)) xay hoi. hieu ve cao duc ban ((anh hai) or (anh thai)) cua tre*.