Perhaps you should try some spelling variations:
hanh via » hanh vi, hanh va, anh va
te sach » toc sach
via cua » gia cua, gian cua, giau cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky dang, ky tang, duy sang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky sang) or (ky nang)) mai hoi. hieu va cam ((xuc va) OR (tuc va)) hanh via cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky sang) OR (ky nang)) mai hoi. hieu va cam ((xuc va) OR (tuc va)) hanh via cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky sang) or (ky nang)) mai hoi. hieu va cam ((xuc va) OR (tuc va)) hanh via cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky sang) or (ky nang)) mai hoi. hieu va cam ((xuc va) OR (tuc va)) hanh via cua tre*.