Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
cau theo » cau thi, cau tao
su sach » so sach, vu sach
ty lang » ty xang, ty hang, tu lang
van cam » van lam, van cau, van dam
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
vi cau » va cau, ve cau, di cau

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 lang) OR (tay lang)) xa hoi. hieu ((van cam) or (van nam)) hoc va tinh vi cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty lang) OR (tay lang)) xa hoi. hieu ((van cam) OR (van nam)) hoc va tinh vi cau theo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty lang) OR (tay lang)) xa hoi. hieu ((van cam) or (van nam)) hoc va tinh vi cau theo*".