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
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, luc va
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

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