Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh vai » hanh vi, hanh va, hanh tai
cam thuc » am thuc, nam thuc, cam thu
hieu ve » hieu va, hieu van
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
bo sach » co sach
cuu tre » cua tre, cau tren, cau treo
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: ((tu sach) or (((hoc sach) or (bo sach)))) ly hang xa hoi. hieu ve cam thuc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((hoc sach) OR (bo sach)))) ly hang xa hoi. hieu ve cam thuc va hanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((hoc sach) or (bo sach)))) ly hang xa hoi. hieu ve cam thuc va hanh vai cuu tre*.