Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
cac luc » cau luc, coc luc, cac cuoc
hieu va » lieu va, hieu qua
sang ma » nang ma, sang tao, mang may
tang ma » mang may, tang van
vi cua » vai cua, di cua
su dai » sau dai, si dai, su tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su dai ly ((sang ma) or (tang ma)) hoi. hieu va ((cac luc) or (cac nuoc)) va tinh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su dai ly ((sang ma) OR (tang ma)) hoi. hieu va ((cac luc) OR (cac nuoc)) va tinh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: su dai ly ((sang ma) or (tang ma)) hoi. hieu va ((cac luc) or (cac nuoc)) va tinh vi cua viet*.