Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien cac » hien cac, thien cau, thieu cac
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van dinh » van minh, van dich, xuan dinh
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va dinh » va tinh, vu dinh, va sinh
va kinh » va tinh, qua kinh
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. hieu thien cac nuoc ((((va dinh) OR (van dinh))) or (va kinh)) dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu thien cac nuoc ((((va dinh) OR (van dinh))) OR (va kinh)) dai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. hieu thien cac nuoc ((((va dinh) OR (van dinh))) or (va kinh)) dai cua tu*".