Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach ty » sach y, sach thu, xach tay
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
sac ky » cac ky, sai ky
va cau » van cau, va cac, va dau
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((((sach ty) OR (sach tu))) or (sac ky)) nang xa hoi. hieu va cau truc va hanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ty) OR (sach tu))) OR (sac ky)) nang xa hoi. hieu va cau truc va hanh va va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach ty) OR (sach tu))) or (sac ky)) nang xa hoi. hieu va cau truc va hanh va va triet*".