Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
trang va » tran van, hang va
hieu van » hieu va, thien van, lieu va
hoi cua » hoi chuc
doi cua » dai cua
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat, trung va
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma

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 ky nang xa hoi. hieu van cac ((truc va) or (trang va)) danh ((doi cua) OR (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu van cac ((truc va) OR (trang va)) danh ((doi cua) OR (hoi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu van cac ((truc va) or (trang va)) danh ((doi cua) OR (hoi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu van cac ((truc va) or (trang va)) danh ((doi cua) OR (hoi cua)) tre*.