Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach vay
sach 2 » sach y
tuc va » thuc va, truc va, tuc xa
vi du » vi dum, va du, li du
ve du » ve su, te du, va du

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach v) or (sach 2)) nang xa hoi. hieu van cam tuc va hanh ((vi du) OR (ve du)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach 2)) nang xa hoi. hieu van cam tuc va hanh ((vi du) OR (ve du)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) or (sach 2)) nang xa hoi. hieu van cam tuc va hanh ((vi du) OR (ve du)) tren".
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) or (sach 2)) nang xa hoi. hieu van cam tuc va hanh ((vi du) OR (ve du)) tren*.