Perhaps you should try some spelling variations:
thien van » thi van
dang xay » dang van, van xay
cau loc » hau loc, cau hoc, cau luc
lang ha » long ha
cua tre » cuu tre, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
van cau » van dau, van hau, van chat
su sac » su sach, su cac, su xac
loc va » hoc va, luc va
sac ky » cac ky, sai ky
cua te » cua tu

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 sac ky ((lang ha) OR (dang xay)) hoi. thien van cau loc va hanh vi ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((lang ha) or (dang xay)) hoi. thien van cau loc va hanh vi ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((lang ha) or (dang xay)) hoi. thien van cau loc va hanh vi ((cua tre) OR (cua te))*.