Perhaps you should try some spelling variations:
hanh san » thanh san, khach san, thanh son
hanh dan » thanh dan, canh dan, hanh dao
lang van » dang van, tang van, hoang van
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
van hoc » van hoa
sai ky » sac ky
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 ky) or (sai ky)) lang van hoc. hieu va cac duc va ((hanh dan) OR (hanh san)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sai ky)) lang van hoc. hieu va cac duc va ((hanh dan) OR (hanh san)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sai ky)) lang van hoc. hieu va cac duc va ((hanh dan) OR (hanh san)) cua te*".