Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
loc lap » doc lap, hoc lap, logic lap
vi cau » va cau, ve cau, di cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang xa hoi. hieu ((van lam) OR (van nam)) loc lap trinh vi cau thi~.
• Adding a wildcard symbol may retrieve word variants: su sach ty lang xa hoi. hieu ((van lam) or (van nam)) loc lap trinh vi cau thi*.