Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chau tre » chay tren, chau tho, cho tre
hanh lai » hanh lam, hanh tai, thanh lap
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
ve cam » ve cham, va cam, ve cai
x hoi » xa hoi, o hoi, x ho

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) or (thuoc sach)) ly nang x hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuoc sach)) ly nang x hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuoc sach)) ly nang x hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuoc sach)) ly nang x hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh lai chau tre*.