Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
chang xu » chang xue, chao xu, thong xu
va hanh » van hanh, va thanh, va danh
sach tu » cach tu, sach ty, sach uu
xu hoi » xa hoi, lu hoi, vu hoi
ve cai » va cai, ve cac, ve tai
vi cua » vai cua, di cua
cua te » cua tu

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 tu) or (sach thu)) chang xu hoi. hieu ((ve cai) or (va cac)) duc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach thu)) chang xu hoi. hieu ((ve cai) OR (va cac)) duc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach thu)) chang xu hoi. hieu ((ve cai) or (va cac)) duc va hanh vi cua te*.