Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh di » thanh doi, thanh de, thanh do
toc sach » hoc sach, doc sach, thuoc sach
van cam » van nam, van cau, van dam
van lam » van nam
sach ty » sach y, sach tu, sach thu
luc bat » suc bat, luc nhat, luat bat
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
hanh de » hanh ve, hanh kem

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang xa hoi. hieu ((van cam) or (van lam)) luc bat ((thanh di) or (hanh de)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. hieu ((van cam) OR (van lam)) luc bat ((thanh di) OR (hanh de)) cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu ((van cam) or (van lam)) luc bat ((thanh di) or (hanh de)) cua triet*.