Perhaps you should try some spelling variations:
sach thai » sac thai, sach tai, sach nha
sach tham » sach nha
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
bang xa » lang xa, bang va, mang xa
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua
ve cai » va cai, ve tai, ve cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach thai) OR (sach tham)) bang xa hoi. hieu ((ve cai) or (ve cac)) tuc va danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thai) OR (sach tham)) bang xa hoi. hieu ((ve cai) OR (ve cac)) tuc va danh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thai) OR (sach tham)) bang xa hoi. hieu ((ve cai) or (ve cac)) tuc va danh di cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach thai) OR (sach tham)) bang xa hoi. hieu ((ve cai) or (ve cac)) tuc va danh di cua tre*.