Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
cham tu » pham tu, cam tu, chai tu
y nang » ky nang, ly nang, v nang
thiet » thieu

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