Perhaps you should try some spelling variations:
hanh va » hang va, hanh vi
va chat » van chat, va phat, cao chat
te sach » toc sach
hieu va » lieu va, hieu qua
ky sang » ky dang, ky tang, duy sang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua

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