Perhaps you should try some spelling variations:
sieu viet » su viet, dien viet, viet viet
bien viet » dien viet, tieng viet, trien viet
truc van » truc va, thuc van, truc ban
hanh dao » lanh dao, thanh dat, thanh dam
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tuc van » thuc van, tuc va, duc van
qua co » qua con, cua co, qua ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang xa hoi. hieu qua co ((tuc van) or (truc van)) hanh dao ((sieu viet) or (bien viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu qua co ((tuc van) OR (truc van)) hanh dao ((sieu viet) OR (bien viet)).
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu qua co ((tuc van) or (truc van)) hanh dao ((sieu viet) or (bien viet))*.