Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
thu sach » tu sach, thuat sach, thuoc sach
quoc ban » quoc lan, quoc quan, quoc binh
quoc bao » quoc oai, hoc bao, quoc va
hanh lai » hanh lam, hanh tai, thanh lap
chau tho » chat thom, cau thi, phu tho
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
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 y nang x hoi. hieu ve cam ((quoc ban) OR (quoc bao)) hanh lai ((chau tho) or (chay tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ve cam ((quoc ban) OR (quoc bao)) hanh lai ((chau tho) OR (chay tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ve cam ((quoc ban) OR (quoc bao)) hanh lai ((chau tho) or (chay tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ve cam ((quoc ban) OR (quoc bao)) hanh lai ((chau tho) or (chay tren))*.