Perhaps you should try some spelling variations:
van khanh » van thanh, van hanh, van anh
cam truc » cau truc, nam truc, lam truoc
truc van » truc va, thuc van, truc ban
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va cam » va cham, va cac, va cao
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang x ho. lieu va cam truc van khanh ((ve cau) or (ve cac)) theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x ho. lieu va cam truc van khanh ((ve cau) OR (ve cac)) theo.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x ho. lieu va cam truc van khanh ((ve cau) or (ve cac)) theo*.