Perhaps you should try some spelling variations:
hoc nhanh » hoc phan
vien cac » vien bach, vien dai, vien da
nang van » dang van, tang van, lang van
hanh hai » thanh hai, nhanh hai, hang hai
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
van hoi » van hoa, van hoc, van hoe
dai va » mai va
ve cac » va cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc nganh) or (hoc nhanh)) ky nang van hoi. hieu ((ve cac) OR (vien cac)) dai va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc nganh) OR (hoc nhanh)) ky nang van hoi. hieu ((ve cac) OR (vien cac)) dai va hanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc nganh) or (hoc nhanh)) ky nang van hoi. hieu ((ve cac) OR (vien cac)) dai va hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((hoc nganh) or (hoc nhanh)) ky nang van hoi. hieu ((ve cac) OR (vien cac)) dai va hanh hai cua tre*.