Perhaps you should try some spelling variations:
dua tren » dung tren
hanh dai » hanh tai, hanh dao, vanh dai
va hanh » van hanh, va thanh, va danh
sach ly » sach y, sach lo, sach hay
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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 ly) OR (sach ty)) nang x hoi. hieu ve cam xuc va hanh dai ((dua tren) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach ty)) nang x hoi. hieu ve cam xuc va hanh dai ((dua tren) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ly) OR (sach ty)) nang x hoi. hieu ve cam xuc va hanh dai ((dua tren) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) OR (sach ty)) nang x hoi. hieu ve cam xuc va hanh dai ((dua tren) or (cua tu))*.