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 ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, mang xa
sach v » sach va, sach y, sach vay
sach 2 » sach y
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 2)) ((nang xa) OR (nang ma)) 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 2)) ((nang xa) OR (nang ma)) 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 2)) ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) or (sach 2)) ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc va hanh vi cua tre*.