Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
ma hai » ta hai, va hai, xa hai
ve cam » ve cham, ve cac, va cam
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
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: so sach ky sang ma hai. hieu ve cam ((luc va) or (((tuc va) or (thuc vat)))) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky sang ma hai. hieu ve cam ((luc va) OR (((tuc va) OR (thuc vat)))) hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ky sang ma hai. hieu ve cam ((luc va) or (((tuc va) or (thuc vat)))) hanh vi cua te*.