Perhaps you should try some spelling variations:
dang hai » dang khai, hang hai, dung hai
danh hai » lanh hai, manh hai, danh hau
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
hieu ve » hieu van
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu

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 x ho. ((hieu ve) or (hieu va)) cam tuc va ((danh hai) OR (dang hai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x ho. ((hieu ve) OR (hieu va)) cam tuc va ((danh hai) OR (dang hai)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x ho. ((hieu ve) or (hieu va)) cam tuc va ((danh hai) OR (dang hai)) cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x ho. ((hieu ve) or (hieu va)) cam tuc va ((danh hai) OR (dang hai)) cua tu*.