Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luc van
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
sach ky » sach y, sach ty, sach kem
sac ky » cac ky, sai ky
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau

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) or (sac ky)) nang x ho. hieu ((ve cau) OR (va cau)) luoc van hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang x ho. hieu ((ve cau) OR (va cau)) luoc van hanh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang x ho. hieu ((ve cau) OR (va cau)) luoc van hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang x ho. hieu ((ve cau) OR (va cau)) luoc van hanh lai chau tre*.