Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
thanh tai » thanh hai, thanh toan, doanh tai
cua viet » ca viet, hoa viet, cua vat
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
tai cua » thai cua, tai cuc, tri cua
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
bac tuc » bac tu, bac thua

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) or (so sach)) ky nang xa hoi. hieu van ((bac tuc) or (bach tuoc)) va thanh tai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang xa hoi. hieu van ((bac tuc) OR (bach tuoc)) va thanh tai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang xa hoi. hieu van ((bac tuc) or (bach tuoc)) va thanh tai cua viet*.