Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
vien cac » vien bach, vien dai, vien da
te sach » toc sach
xa hanh » xa thanh, xa khanh, va hanh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
ve cac » va cac
ve cam » ve cham, va cam, ve cai
vi cua » vai cua, di cua

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 thu nang xa hoi. hieu ((ve cam) or (((ve cac) OR (vien cac)))) tuc xa hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu nang xa hoi. hieu ((ve cam) OR (((ve cac) OR (vien cac)))) tuc xa hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu nang xa hoi. hieu ((ve cam) or (((ve cac) OR (vien cac)))) tuc xa hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach thu nang xa hoi. hieu ((ve cam) or (((ve cac) OR (vien cac)))) tuc xa hanh vi cua tre*.