Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, 5 hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((x hoi) OR (x ho)). hieu qua cam tuc va hanh ((vi luu) OR (vi lua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ((x hoi) OR (x ho)). hieu qua cam tuc va hanh ((vi luu) or (vi lua)) tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((x hoi) OR (x ho)). hieu qua cam tuc va hanh ((vi luu) or (vi lua)) tre*.