Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc
dat duoc » dat nuoc, da duoc, luat duoc
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
sach ly » sach y, sach lo, sach ty
hanh va » hang va, hanh vi
ma hanh » va hanh, da hanh, na hanh
va cua » va chua, via cua, ca cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ly nang xa hoi. hieu van ((((nam duoc) OR (nam moc))) or (dat duoc)) ma hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang xa hoi. hieu van ((((nam duoc) OR (nam moc))) OR (dat duoc)) ma hanh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang xa hoi. hieu van ((((nam duoc) OR (nam moc))) or (dat duoc)) ma hanh va cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang xa hoi. hieu van ((((nam duoc) OR (nam moc))) or (dat duoc)) ma hanh va cua te*.