Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
van bac » van ban, van bao, van hac
xuc ban » duc ban, cuc ban, quoc ban
lap cua » tap cua, lam cua, ap cua
lai cua » dai cua, hai cua, lai chau
sac ky » cac ky, sai ky

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) or (sac ky)) nang xa hoi. thi van bac xuc ban thanh ((lap cua) OR (lai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang xa hoi. thi van bac xuc ban thanh ((lap cua) OR (lai cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) nang xa hoi. thi van bac xuc ban thanh ((lap cua) OR (lai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) nang xa hoi. thi van bac xuc ban thanh ((lap cua) OR (lai cua)) viet*.