Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cham tuc » nham thuc, pham thuc, cham soc
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
dang xa » dang xay, lang xa, dang ha
ty dang » ty xang, ky dang, ty hang
vi su » va su, ki su, oi su
ve su » va su

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 dang xa hoi. hieu qua ((cham tuc) OR (tham thuc)) va hanh ((vi su) OR (ve su)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty dang xa hoi. hieu qua ((cham tuc) or (tham thuc)) va hanh ((vi su) OR (ve su)) triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty dang xa hoi. hieu qua ((cham tuc) or (tham thuc)) va hanh ((vi su) OR (ve su)) triet*.