Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
xanh di » vanh dai, xanh tai
danh di » danh du, danh dien, danh gia
vu sai » vu hai, vu dai, vu tai
nang o » nang co, nang ho, nang ro
vu san » va san, vu ban
ve cac » va cac, vien cac
du va » dau va, tu va, su va
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sai) OR (vu san)) ky nang o hoi. hieu ve cac du va ((danh di) or (xanh di)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sai) OR (vu san)) ky nang o hoi. hieu ve cac du va ((danh di) OR (xanh di)) cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sai) OR (vu san)) ky nang o hoi. hieu ve cac du va ((danh di) or (xanh di)) cau tren*".