Perhaps you should try some spelling variations:
sach tham » sach nha
chat tre » chay tren, chat tai, cho tre
cham duc » cham soc, pham duy, phan duc
lam chat » luan chat, cao chat, ly chat
hanh lam » thanh lap, hanh kem, hanh va
sach thu » sach thue, sach thieu, cach thuc
va hanh » van hanh, va thanh, va danh
tang ma » mang may, tang van
hieu vu » hieu va, hieu ve, hieu su

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