Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hieu van » hieu va, thien van, lieu va
dinh vai » dinh van, dinh vi, dinh tai
dinh va » dinh van, dinh ve, tinh va
lam xuc » cam xuc, lam duoc
su sach » so sach, vu sach
nang so » nang som, nang co, nang ho
van lam » van nam
so hoc » co hoc, mo hoc, so hoa
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thuat sach)) ky nang so hoc. hieu van lam xuc va ((dinh vai) OR (dinh va)) cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat sach)) ky nang so hoc. hieu van lam xuc va ((dinh vai) OR (dinh va)) cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuat sach)) ky nang so hoc. hieu van lam xuc va ((dinh vai) OR (dinh va)) cua thuoc".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat sach)) ky nang so hoc. hieu van lam xuc va ((dinh vai) OR (dinh va)) cua thuoc*.