Perhaps you should try some spelling variations:
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ca viet » va viet, co viet, hoa viet
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vi ca » vit ca, li ca, va ca

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