Perhaps you should try some spelling variations:
chau tre » chay tren, chau tho, cho tre
hanh lai » hanh lam, hanh tai, thanh lap
hoc sach » hoc sinh, hoc cac, hoc anh
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
vu sach » vu bach, su sach, vu khach
ly nang » ky nang, ly vang, ly quang
ly hang » ly quang
ve cam » ve cham, ve cac, va cam
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 (hoc sach)) ((ly nang) OR (ly hang)) o hoi. hieu ve cam duc va hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (hoc sach)) ((ly nang) OR (ly hang)) o hoi. hieu ve cam duc va hanh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (hoc sach)) ((ly nang) OR (ly hang)) o hoi. hieu ve cam duc va hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (hoc sach)) ((ly nang) OR (ly hang)) o hoi. hieu ve cam duc va hanh lai chau tre*.