Perhaps you should try some spelling variations:
khoa mang » khoa dang, khoa mong, khoai lang
cac khoa » cac khoan, cac khoi, dac khoa
tham loc » tham nuoc, cham soc, hau loc
may hoi » may thoi, tay hoi, mai hoi
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
luy tre » luyen tre
loc va » hoc va, luc va
tru » truc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac khoa mang may hoi. hieu va tham loc va hanh vi ((luy tre) or (luu tru))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac khoa mang may hoi. hieu va tham loc va hanh vi ((luy tre) OR (luu tru)).
• Adding a wildcard symbol may retrieve word variants: tu cac khoa mang may hoi. hieu va tham loc va hanh vi ((luy tre) or (luu tru))*.