Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
su viet » so viet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao
vi su » va su, ve su, ki su

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 v nang xa hoi. hieu va cam ((xuc van) OR (duc van)) hanh vi su viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang xa hoi. hieu va cam ((xuc van) OR (duc van)) hanh vi su viet".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang xa hoi. hieu va cam ((xuc van) OR (duc van)) hanh vi su viet*.