Perhaps you should try some spelling variations:
va tieng » va tinh, tu tieng, va thong
hanh vai » hanh vi, hanh va, hanh tai
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
vu sach » vu bach, vu khach
ve nam » he nam, va nam, le nam
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) OR (vu sach)) ly nang xa hoi. hieu ve nam thuc va hanh vai ((va tieng) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ly nang xa hoi. hieu ve nam thuc va hanh vai ((va tieng) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ly nang xa hoi. hieu ve nam thuc va hanh vai ((va tieng) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ly nang xa hoi. hieu ve nam thuc va hanh vai ((va tieng) or (va thiet))*.