Perhaps you should try some spelling variations:
trong gay » trong cay, trong giao, trong giai
nam trong » nam trung, cay trong
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
gay tinh » may tinh, tay tinh, giao tinh
tinh vi » trinh vi, tinh voi, tinh va
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 ((nang xa) OR (lang xa)) hoi. ((hieu van) OR (thien van)) nam trong gay tinh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) OR (lang xa)) hoi. ((hieu van) or (thien van)) nam trong gay tinh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) OR (lang xa)) hoi. ((hieu van) or (thien van)) nam trong gay tinh vi cua tre*.