Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua triet » su triet, va triet
va thanh » gia thanh, va tinh, le thanh
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
bac tuc » bac tu, bach tuoc, bac thua
va bac » van bac, va cac, va bai

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 xa hoi. hieu va bac tuc ((va thanh) OR (ban thanh)) tai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu va bac tuc ((va thanh) OR (ban thanh)) tai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu va bac tuc ((va thanh) OR (ban thanh)) tai ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu va bac tuc ((va thanh) OR (ban thanh)) tai ((cua triet) or (cua viet))*.