Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
va danh » va dinh, va dan, va hanh
vu bac » vu bach, vu ban, du bac
xu bac » xa bac
nam tu » nam thu, nam thuc
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 bac) or (xu bac)) ky nang x ho. hieu van nam tu ((va thanh) or (va danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bac) OR (xu bac)) ky nang x ho. hieu van nam tu ((va thanh) OR (va danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: ((vu bac) or (xu bac)) ky nang x ho. hieu van nam tu ((va thanh) or (va danh)) ki su triet*.