Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
bach ky » bac ky
van cam » van nam, van lam, van cau
cam thu » nam thu, cac thu, ca thu
va tinh » may tinh
va danh » va dinh, va dan, va hanh
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky nang x ho. hieu van cam thu ((va tinh) or (va danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky nang x ho. hieu van cam thu ((va tinh) OR (va danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang x ho. hieu van cam thu ((va tinh) or (va danh)) ki su triet*.