Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh hai » dang hai, lanh hai, manh hai
te sach » toc sach
cua tuc » cua duc, cua tu, cua thuoc
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
cua su » qua su
tuc va » thuc va, truc va, tuc xa
xuc va » duc va, luc va, xac va
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai

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

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