Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
cham duc » pham duc, cham soc, pham duy
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
va cham » va chat, va tham
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
dai hoa » dai khoa, dai hoc, dai hoi
cai hoi » cau hoi, dai hoi, cai hoa
cuu tre » cau tren, cau treo

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

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