Perhaps you should try some spelling variations:
tinh lap » trinh lap, tinh lao, dinh lap
cham tuc » nham thuc, pham thuc, tham thuc
tu sach » thu sach, su sach, te sach
va tinh » may tinh
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
tai hoi » tai khoi, dai hoi, tai hai
ky dung » ly dung, ky dang, ky vung
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: tu sach ky dung tai hoi. ((hieu ve) OR (hieu va)) cham tuc va tinh lap ((dung trong) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dung tai hoi. ((hieu ve) OR (hieu va)) cham tuc va tinh lap ((dung trong) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dung tai hoi. ((hieu ve) OR (hieu va)) cham tuc va tinh lap ((dung trong) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dung tai hoi. ((hieu ve) OR (hieu va)) cham tuc va tinh lap ((dung trong) or (cua tu))*.