Perhaps you should try some spelling variations:
tran anh » tran manh, tuan anh, tran thanh
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
cao suc » cao su, cao duc
su viet » so viet
cao xuc » cam xuc, cao duc, chat xuc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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: su sach v nang xa hoi. hieu va ((cao xuc) OR (cao suc)) ((van hanh) or (tran anh)) vi su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang xa hoi. hieu va ((cao xuc) OR (cao suc)) ((van hanh) OR (tran anh)) vi su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang xa hoi. hieu va ((cao xuc) OR (cao suc)) ((van hanh) or (tran anh)) vi su viet".
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu va ((cao xuc) OR (cao suc)) ((van hanh) or (tran anh)) vi su viet*.