Perhaps you should try some spelling variations:
cho thanh » cho phan, tro thanh, cuu thanh
tinh vai » tinh va, tinh hai, tinh bai
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
lo hang » ly hang, le hang, cho hang
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
va hoi » xa hoi, va hoc, va hoa
tuc va » thuc va, truc va, tuc xa

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 ((lo hang) or (cho thanh)) va hoi. hieu va cam tuc va tinh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((lo hang) OR (cho thanh)) va hoi. hieu va cam tuc va tinh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((lo hang) or (cho thanh)) va hoi. hieu va cam tuc va tinh vai cua tre*.