Perhaps you should try some spelling variations:
dieu cua » dieu tra
cai nuoc » cap nuoc, cac nuoc, cuoi nuoc
su sach » so sach, vu sach
va danh » va dinh, va dan, va hanh
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve cai » va cai, ve cac, ve tai
di cua » dai cua, doi cua, de cua

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 ((nang xa) or (nang x)) hoi. hieu ve cai nuoc va danh ((di cua) or (dieu cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (nang x)) hoi. hieu ve cai nuoc va danh ((di cua) OR (dieu cua)) te.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (nang x)) hoi. hieu ve cai nuoc va danh ((di cua) or (dieu cua)) te*.