Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
ve cham » va cham, ve chat, vu cham
hanh ve » hanh vi, hanh va, hanh kem
sac van » cac van, san van, sat van
soc van » hoc van, oc van, soc dan
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te 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) or (sach y)) nang mai hoi. hieu ve cham ((soc van) OR (sac van)) hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang mai hoi. hieu ve cham ((soc van) OR (sac van)) hanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) nang mai hoi. hieu ve cham ((soc van) OR (sac van)) hanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) nang mai hoi. hieu ve cham ((soc van) OR (sac van)) hanh ve cua tre*.