Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
vien dai » hien dai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
ve cai » va cai, ve cac, ve tai
luc va » duc va, tuc va, loc va
vi hoa » voi hoa, vi hoc, va hoa

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 thieu nang xa hoi. hieu ((((vien dai) or (ve cai))) or (ve cham)) luc va hanh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu nang xa hoi. hieu ((((vien dai) OR (ve cai))) OR (ve cham)) luc va hanh vi hoa viet.
• Adding a wildcard symbol may retrieve word variants: tu sach thieu nang xa hoi. hieu ((((vien dai) or (ve cai))) or (ve cham)) luc va hanh vi hoa viet*.