Perhaps you should try some spelling variations:
thien van » thi van
van hanh » van thanh, ban hanh, van anh
hanh han » hanh nhan, hanh phan, hanh san
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
cua tre » cuu tre, cua triet, dua tren
so sac » so sach, so dac
sac ky » cac ky, sai ky
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: so sac ky tang xa hoi. ((thien van) or (hieu va)) bac xuc van hanh han ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky tang xa hoi. ((thien van) OR (hieu va)) bac xuc van hanh han ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky tang xa hoi. ((thien van) or (hieu va)) bac xuc van hanh han ((cua tre) OR (cua te))*".