Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
cham giua » tham gia, nhat giua, cam gia
ban thanh » ban hanh, ban hang
cham dua » chay dua, pham duc, pham duy
thai cua » than cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
ky tang » ky dang, kho tang, ky trong
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky tang) or (ky nang)) xa hoi. hieu va ((cham dua) OR (cham giua)) ban thanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (ky nang)) xa hoi. hieu va ((cham dua) OR (cham giua)) ban thanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky tang) or (ky nang)) xa hoi. hieu va ((cham dua) OR (cham giua)) ban thanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (ky nang)) xa hoi. hieu va ((cham dua) OR (cham giua)) ban thanh thai cua tre*.