Perhaps you should try some spelling variations:
lam chat » luan chat, cao chat, ly chat
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
dua ban » dia ban, cua ban, qua ban
lam cua » nam cua
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
duc ban » duc tan, duc van, duc man
ty nang » ky nang, ty xang, ty hang
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. hieu van cham ((duc ban) or (dua ban)) hanh ((lam cua) OR (lam chat)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu van cham ((duc ban) OR (dua ban)) hanh ((lam cua) OR (lam chat)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang x hoi. hieu van cham ((duc ban) or (dua ban)) hanh ((lam cua) OR (lam chat)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu van cham ((duc ban) or (dua ban)) hanh ((lam cua) OR (lam chat)) triet*.