Perhaps you should try some spelling variations:
kho tang » cao tang
hieu va » lieu va, hieu qua
ky tang » ky nang, ky dang, ky trong
lap hai » lap tai, lap lai, lap hoat
xuc va » duc va, tuc va, xac va
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
su sac » su sach, su cac, su xac
va cam » va cham, va cac, va cao
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: su sac ((ky tang) OR (kho tang)) lap hai. hieu va cam ((xuc va) or (luc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (kho tang)) lap hai. hieu va cam ((xuc va) OR (luc va)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky tang) OR (kho tang)) lap hai. hieu va cam ((xuc va) or (luc va)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) OR (kho tang)) lap hai. hieu va cam ((xuc va) or (luc va)) hanh vi cua te*.