Perhaps you should try some spelling variations:
hang cau » hang dau, hang ca, nhung cau
hanh via » hanh vi, hanh va, anh va
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
duoc da » duoc dai, duoc dan, duoc dao
da hanh » dao hanh, da thanh, dan hanh
ve tao » ve bao, de tao, ve tac
cua tu » cua tuc, cua su, cua cu

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 ty) or (sach thieu)) hang cau hoi. hieu ve tao duoc da hanh via ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thieu)) hang cau hoi. hieu ve tao duoc da hanh via ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thieu)) hang cau hoi. hieu ve tao duoc da hanh via ((cua te) or (cua tu))*.