Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
hanh lam » thanh lap, hanh kem, hanh va
ve triet » va trien, su triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
tuc va » thuc va, truc va, tuc xa

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 tru nang xa hoi. hieu ve chat ((tuc va) or (duc va)) ((hanh lam) or (hanh vi)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru nang xa hoi. hieu ve chat ((tuc va) OR (duc va)) ((hanh lam) OR (hanh vi)) ve triet.
• Adding a wildcard symbol may retrieve word variants: su sach tru nang xa hoi. hieu ve chat ((tuc va) or (duc va)) ((hanh lam) or (hanh vi)) ve triet*.