Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
so nganh » so ngan, hoc nganh, moi nganh
nganh ky » nganh y, nganh xay, hanh ky
vinh cau » sinh cau, vinh cuu, minh cau
cau tren » cu tren, dau tren, ca tren
van bac » van ban, van bao, van hac
van cac » van hac, van cau, dan cac
va danh » va dinh, va dan, va hanh
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: so nganh ky nang x hoi. hieu ((van cac) or (van bac)) du ((van thanh) or (va danh)) vinh cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so nganh ky nang x hoi. hieu ((van cac) OR (van bac)) du ((van thanh) OR (va danh)) vinh cau tren.
• Adding a wildcard symbol may retrieve word variants: so nganh ky nang x hoi. hieu ((van cac) or (van bac)) du ((van thanh) or (va danh)) vinh cau tren*.