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 » pham duc, cham soc, pham duy
su sach » so sach, vu sach
lam cua » nam cua, lam chat
va hanh » van hanh, va thanh, va danh
hieu va » hieu qua
hieu vu » hieu ve, hieu su, dieu vu
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet

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 tham tang ma hoa. ((hieu vu) or (((hieu va) or (lieu va)))) cham duc va hanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tham tang ma hoa. ((hieu vu) OR (((hieu va) OR (lieu va)))) cham duc va hanh lam cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach tham tang ma hoa. ((hieu vu) or (((hieu va) or (lieu va)))) cham duc va hanh lam cua tre*.