Perhaps you should try some spelling variations:
chau tho » chat thom, cau thi, phu tho
chau tre » chay tren, cho tre, cau tra
hanh lai » hanh lam, hanh tai, thanh lap
ban hanh » ban hang
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
ve cam » ve cac, va cam, 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: tu sach ky nang x hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh lai ((chau tre) or (chau tho))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh lai ((chau tre) OR (chau tho)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh lai ((chau tre) or (chau tho))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((ve cam) OR (ve cham)) duc ban hanh lai ((chau tre) or (chau tho))*.