Perhaps you should try some spelling variations:
hoang hai » hoang thi, hoang van
cham cuu » cap cuu, chat cua
ban hanh » ban hang
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
son hai » cong hai
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cuu ban » cuu van, cua ban, cuu san
hanh do » thanh do, hanh dao, hanh de
do cua » doi cua, co cua, de cua

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 ((son hai) or (hoang hai)). hieu va cham cuu ban hanh do cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((son hai) OR (hoang hai)). hieu va cham cuu ban hanh do cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((son hai) or (hoang hai)). hieu va cham cuu ban hanh do cua viet*.