Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
sang lap » sang tao, sang ma, sang tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((sang lap) or (hang tai)) hai. hieu ve cam ((xuc va) or (duc va)) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((sang lap) OR (hang tai)) hai. hieu ve cam ((xuc va) OR (duc va)) hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((sang lap) or (hang tai)) hai. hieu ve cam ((xuc va) or (duc va)) hanh vi cua tu*.