Perhaps you should try some spelling variations:
doanh qua » doanh quan, doanh cua, danh qua
sang mai » sang ma, sang tai, lang mai
hieu van » hieu va, thien van, lieu va
va doanh » van doanh, vay doanh, va danh
sach ky » sach y, sach ty, sach kem
mai hoi » mai khoi, dai hoi, lai hoi
van bac » van ban, van bao, van hac
qua cua » quan cua, quang cua, qua quan
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va

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 ky) or (sac ky)) sang mai hoi. hieu van bac xuc va doanh qua cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) sang mai hoi. hieu van bac xuc va doanh qua cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) sang mai hoi. hieu van bac xuc va doanh qua cua tre*.