Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ke » hieu kem, chieu ke, hieu ky
cau luc » cau truc, cau phuc
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
ke cau » ket cau
vi luu » vi lua

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 y nang xa hoi. hieu ke cau luc ((((va thanh) or (ban hanh))) or (van hanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ke cau luc ((((va thanh) OR (ban hanh))) OR (van hanh)) vi luu tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ke cau luc ((((va thanh) or (ban hanh))) or (van hanh)) vi luu tre*.