Perhaps you should try some spelling variations:
sach tham » sach nha
pham thuc » phap thuc, pham chuc, nham thuc
cham tuc » nham thuc, tham thuc, cham soc
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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 ty) or (sach tham)) lang xa hoi. hieu ve ((cham tuc) or (pham thuc)) va thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tham)) lang xa hoi. hieu ve ((cham tuc) OR (pham thuc)) va thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tham)) lang xa hoi. hieu ve ((cham tuc) or (pham thuc)) va thanh va cua tre*.