Perhaps you should try some spelling variations:
hoc hanh » hoc nhanh, hoc thanh, hoc anh
nang van » dang van, tang van, lang van
hanh hai » thanh hai, nhanh hai, hang hai
van hoc » van hoa
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
hanh ky » hanh kem
va cao » va cac, va co, va dao
ve cac » va cac, vien cac
ve cao » ve bao, ve co, vu cao
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: hoc hanh ky nang van hoc. hieu ((((ve cao) OR (ve cac))) or (va cao)) duc va hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hanh ky nang van hoc. hieu ((((ve cao) OR (ve cac))) OR (va cao)) duc va hanh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hanh ky nang van hoc. hieu ((((ve cao) OR (ve cac))) or (va cao)) duc va hanh hai cua te".
• Adding a wildcard symbol may retrieve word variants: hoc hanh ky nang van hoc. hieu ((((ve cao) OR (ve cac))) or (va cao)) duc va hanh hai cua te*.