Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
va thanh » gia thanh, ban thanh, va tinh
nang cai » nang cao, nang tai, nang cap
pham day » phap day, pham duy, pham dac
pham xay » phan xay, pham van, pham tai
cuu tre » cau tren, cau treo
cai hoi » cau hoi, dai hoi, cai hoa
hieu va » lieu va, hieu qua
cua tre » cua te, cua triet, dua tren
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 ((pham day) OR (pham xay)) va thanh thai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang cai hoi. hieu va ((pham day) OR (pham xay)) va thanh thai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang cai hoi. hieu va ((pham day) OR (pham xay)) va thanh thai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang cai hoi. hieu va ((pham day) OR (pham xay)) va thanh thai ((cua tre) or (cuu tre))*.