Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
ly nang » ky nang, ly hang, ly vang
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, 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: ((thu sach) or (thuoc sach)) ly nang x hoi. hieu ((ve cam) OR (va cam)) tuc va hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ly nang x hoi. hieu ((ve cam) OR (va cam)) tuc va hanh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) ly nang x hoi. hieu ((ve cam) OR (va cam)) tuc va hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) ly nang x hoi. hieu ((ve cam) OR (va cam)) tuc va hanh lai chau tre*.