Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
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: tu sach ky ((nang xa) or (nang ma)) hoi. hieu ve pham duc va hanh thai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang ma)) hoi. hieu ve pham duc va hanh thai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (nang ma)) hoi. hieu ve pham duc va hanh thai ((cua tre) or (cuu tre))*.