Perhaps you should try some spelling variations:
quyen tan » huyen tan, quyen van, nguyen tan
quyet tan » quyet toan, quyet van, quyet tam
thua dung » thuat dung, thuy dung, thuc dung
thuat ung » thuat dung, thuat hung, thuat xung
tran thu » tran thuy, tran thi, tuan thu
ban ve » ban va
ve ky » va ky, ke ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((quyen tan) OR (quyet tan)) tran thu đe co ban ve ky ((thua dung) or (thuat ung)) cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((quyen tan) OR (quyet tan)) tran thu đe co ban ve ky ((thua dung) OR (thuat ung)) cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((quyen tan) OR (quyet tan)) tran thu đe co ban ve ky ((thua dung) or (thuat ung)) cong".
• Adding a wildcard symbol may retrieve word variants: ((quyen tan) OR (quyet tan)) tran thu đe co ban ve ky ((thua dung) or (thuat ung)) cong*.