Perhaps you should try some spelling variations:
thoi chuc » toi chuc, hoi chu, choi thuc
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
cac xuc » cam xuc, cac nuoc, chat xuc
va danh » va dinh, va dan, va hanh
sach ty » sach y, sach tu, xach tay
lang xa » lang ha, dang xay, lang van
van cac » van hac, van cau, van bac
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) OR (sach thu)) lang xa hoi. hieu van cac xuc va danh ((hoi chuc) or (thoi chuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) lang xa hoi. hieu van cac xuc va danh ((hoi chuc) OR (thoi chuc)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach thu)) lang xa hoi. hieu van cac xuc va danh ((hoi chuc) or (thoi chuc)) tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach thu)) lang xa hoi. hieu van cac xuc va danh ((hoi chuc) or (thoi chuc)) tre*.