Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
sach va » sach xa, sach ha, sach dao
sach 2 » sach y
sach v » sach y, sach vay
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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 v) OR (sach va))) or (sach 2)) nang xa hoi. hieu ve cam tuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach v) OR (sach va))) OR (sach 2)) nang xa hoi. hieu ve cam tuc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach v) OR (sach va))) or (sach 2)) nang xa hoi. hieu ve cam tuc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((((sach v) OR (sach va))) or (sach 2)) nang xa hoi. hieu ve cam tuc va hanh vi cua tre*.