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