Perhaps you should try some spelling variations:
hanh va » hang va, hanh vi
truc va » thuc va, thuc vat, trung va
sach ky » sac ky, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sach y)) nang xa hoi. hieu ve cam ((xuc va) or (truc va)) hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang xa hoi. hieu ve cam ((xuc va) OR (truc va)) hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) nang xa hoi. hieu ve cam ((xuc va) or (truc va)) hanh va cua tre*.