Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
sang xa » song xa, lang xa, sang ma
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va
loc va » hoc va
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: tu sach ky sang xa hoi. hieu ve cam ((xuc va) or (((luc va) or (loc va)))) hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang xa hoi. hieu ve cam ((xuc va) OR (((luc va) OR (loc va)))) hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang xa hoi. hieu ve cam ((xuc va) or (((luc va) or (loc va)))) hanh vi cua vat*.