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

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) OR (cuu 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) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((lo hang) or (cho thanh)) va hoi. hieu va cam tuc va tinh vai ((cua tre) OR (cuu 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) OR (cuu tre))*.