Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
va triet » va thiet, va trien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
thuc van » thuc dan, thuc va, thuc hanh
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
ve nam » he nam, va nam, le nam

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 ty nang xa hoi. hieu ve nam ((thuc van) OR (thuc vat)) hanh vai ((va triet) or (va thieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. hieu ve nam ((thuc van) OR (thuc vat)) hanh vai ((va triet) OR (va thieu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang xa hoi. hieu ve nam ((thuc van) OR (thuc vat)) hanh vai ((va triet) or (va thieu))".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. hieu ve nam ((thuc van) OR (thuc vat)) hanh vai ((va triet) or (va thieu))*.