Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
thanh thai » thanh hai, thanh tai, thanh thao
nang cai » nang cao, nang tai, nang cap
tham duc » pham duc, tham du, than duc
cai hoi » cau hoi, dai hoi, cai hoa
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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 nang cai hoi. hieu va tham duc va ((thanh thai) OR (nhanh thai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang cai hoi. hieu va tham duc va ((thanh thai) OR (nhanh thai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang cai hoi. hieu va tham duc va ((thanh thai) OR (nhanh thai)) cua tre*.