Perhaps you should try some spelling variations:
sach tham » sach nha
tham tang » nham tang, thai tang, tham lang
hanh lam » thanh lap, hanh kem, hanh va
cham duc » cham soc, pham duy, phan duc
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
hieu va » lieu va, hieu qua
tang ma » mang may, tang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tham tang ma hoa. hieu va ((cham duc) or (pham duc)) va hanh lam ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tham tang ma hoa. hieu va ((cham duc) OR (pham duc)) va hanh lam ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: so sach tham tang ma hoa. hieu va ((cham duc) or (pham duc)) va hanh lam ((cua tre) or (cuu tre))*.