Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cau luoc » cau luc, muu luoc, cau hoc
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
hau loc » huu loc, phau hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang x ho. hieu ve ((cau luoc) OR (hau loc)) van hanh lai chau tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x ho. hieu ve ((cau luoc) OR (hau loc)) van hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. hieu ve ((cau luoc) OR (hau loc)) van hanh lai chau tre*.