Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
cam dan » cac dan, ca dan, nam dan
xuc cam » phuc cam
cac xuc » cam xuc, cac nuoc, chat xuc
van cac » van hac, van cau, van bac
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
vi cua » di 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 ky ((nang xa) OR (nang x)) hoi. hieu van cac xuc cam dan ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang x)) hoi. hieu van cac xuc cam dan ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (nang x)) hoi. hieu van cac xuc cam dan ((vi cua) or (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (nang x)) hoi. hieu van cac xuc cam dan ((vi cua) or (vai cua)) tre*.