Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
thu sang » thu san, thu bang, thu dang
vien cua » viec cua, dien cua, tien cua
thu hang » thi hang, thuc hanh, thu huong
duc van » duc va, duc tan, duc manh
xuc van » luc van, vuc van, xuc ban
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
ma noi » ha noi, ma moi, va noi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sang) or (thu hang)) ky tang ma noi. hieu vu cham ((xuc van) OR (duc van)) thanh vien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sang) OR (thu hang)) ky tang ma noi. hieu vu cham ((xuc van) OR (duc van)) thanh vien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sang) or (thu hang)) ky tang ma noi. hieu vu cham ((xuc van) OR (duc van)) thanh vien cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sang) or (thu hang)) ky tang ma noi. hieu vu cham ((xuc van) OR (duc van)) thanh vien cua tre*.